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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Background</span><p id="par0005" class="elsevierStylePara elsevierViewall">Geographic tongue &#40;GT&#41; or benign migratory glossitis is a condition characterized by the appearance of 1 or more atrophic areas on the dorsum and lateral edges of the tongue due to the absence of filiform papillae&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">1</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">Precisely defining the epidemiological data regarding the condition&#39;s incidence is difficult&#44; given that different rates are reported within the same country&#46; In Sweden&#44; for example&#44; there have been fluctuations in sample size and selection and in the year the study was conducted&#44; with reported prevalence rates in the general population of up to 8&#46;45&#37;&#46;<a class="elsevierStyleCrossRefs" href="#bib0220"><span class="elsevierStyleSup">2&#8211;4</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">GT is clinically classified as &#40;a&#41; active or typical&#44; when demarcated by a white &#40;or intense red&#41;&#44; slightly elevated&#44; keratotic edge and &#40;b&#41; passive&#44; abortive or atypical if this edge is missing or disappears before completing the GT formation process&#46; Depending on its dynamism&#44; GT can also be classified as migratory or fixed&#46; Lesions are occasionally found in other locations of the oral cavity and are commonly known as migratory stomatitis&#44; geographical stomatitis or ectopic GT&#46;<a class="elsevierStyleCrossRef" href="#bib0235"><span class="elsevierStyleSup">5</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">The cause of GT is still unknown but has been reported in patients with a family history of this disease and is frequently found in patients with underlying immune diseases&#44; diseases with systemic repercussions and after administering various treatments&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">6</span></a> The lesion is dynamic&#44; because it changes morphology within hours&#44; is self-limiting by healing in days or weeks and can reoccur within a variable period&#46;<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">7</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">The objective of this systematic review was to search for information on the comorbid diseases of GT to develop an updated algorithm for its management&#44; which can be applied as guidelines or a reference for practitioners who most often diagnose this disease&#46; To this end&#44; we selected observational&#44; cross-sectional studies&#44; cohort studies&#44; case&#8211;control studies and clinical trials on the diagnosis of GT and its associated diseases and its therapeutic alternatives&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Materials and methods</span><p id="par0030" class="elsevierStylePara elsevierViewall">This section was planned by following the Preferred Reporting Items for Systematic Reviews and Meta-analyses system criteria&#46;<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">8</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Question at hand</span>&#58; Is there a relationship between GT and some disease that facilitates its management&#44; prevention and treatment&#63;</p><p id="par0040" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Eligibility criteria</span>&#58; The condition of GT should be defined &#40;1&#41; as the presence of a lesion with atrophy of the lingual filiform papillae surrounded by a white-yellowish border<a class="elsevierStyleCrossRefs" href="#bib0215"><span class="elsevierStyleSup">1&#44;5</span></a> or &#40;2&#41; by referring to its source&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">We also considered as inclusion criteria the articles published in journals&#44; designed on cross-sectional studies&#44; cohort studies&#44; case&#8211;control studies and randomized clinical trials&#46; These articles had to be written in English&#44; accompanied or not&#44; by another language&#46; As exclusion criteria&#44; we ruled out prevalence &#40;or epidemiological&#41; studies&#44; reviews&#44; letters to the editor&#44; and contributions to congresses &#40;conferences&#44; presentations and posters&#41;&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Search strategy</span>&#58; The search was conducted on the PubMed&#44; EMBASE&#44; Web of Science and Cochrane databases&#46; The search strategy included the following keywords</p><p id="par0055" class="elsevierStylePara elsevierViewall">Geographic tongue and Benign migratory glossitis&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Study selection</span>&#58; The publications were initially identified by title and author to exclude duplicates&#46; Using the title&#44; abstract and&#47;or directly from the full text&#44; we selected the potentially relevant articles related to diseases associated with GT&#44; its diagnosis&#44; symptoms and treatment&#46; The screening process for the articles was performed by two authors &#40;GA and GP&#41;&#44; whose agreement rate was 97&#46;2&#37;&#46; The articles that met the eligibility criteria were fully read and analyzed by the three authors&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Data recording</span>&#58; We recorded data on the author&#40;s&#41;&#8217; last name and year of publication&#46; We also included the following variables&#58; the number of examined patients with GT&#44; their age&#44; sex&#44; symptoms and associated diseases&#46; The complementary diagnostic technique &#40;cytology and biopsy&#41; and treatment prescribed was also provided&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Prioritization of results</span>&#58; We described the results covering the context of prevalence of the associated diseases&#44; their clinical manifestation&#44; diagnosis and therapeutics&#46; The data analysis was descriptive&#44; providing values on frequency&#44; ranges and mean&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Risk of bias in the studies and between the studies</span>&#58; Due to the plurality of the objectives of each research study and the clinical&#8211;pathological diversity associated with the participants of these studies&#44; we did not evaluate the individual quality or interstudy quality&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Results</span><p id="par0080" class="elsevierStylePara elsevierViewall">Initially&#44; the PubMed search found 1296 studies &#40;1951 to October 31&#44; 2017&#41;&#44; EMBASE provided 983 &#40;1952 to October 31&#44; 2017&#41;&#44; Web of Science provided 468 &#40;1910 to December 31&#44; 2017&#41;&#44; and the Cochrane database included 11 articles &#40;1964 to 2017&#41;&#44; resulting in a total of 2758 publications&#46; After discarding the duplicates by title and author&#44; we reduced the sample to 1021 articles&#46;</p><p id="par0085" class="elsevierStylePara elsevierViewall">As we mentioned&#44; we first differentiated the titles and abstracts and excluded publications not directly related to the topic &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>939&#41;&#46; After reading the abstracts &#40;or full text in cases where the abstract provided insufficient information or was not available&#41;&#44; we selected 82 publications&#46; Of these&#44; we discarded 49&#44; 11 for not meeting the inclusion criteria and 38 for not defining the GT disease&#46; Ultimately&#44; 33 studies met the inclusion criteria&#44; referencing 12 different authors to express the concept of GT&#46; The selected articles were published between 1956 and 2017&#46; <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a> shows the flow diagram for the study selection&#46;<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">9&#8211;41</span></a></p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Demographic characteristics and toxic habits</span><p id="par0090" class="elsevierStylePara elsevierViewall">A total of 4998 patients were analyzed with GT in the sample of 33 articles that made up the review&#46; The studies&#8217; sample sizes ranged from 10<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">32</span></a> to 801 cases of GT &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0385"><span class="elsevierStyleSup">35</span></a> The patients&#8217; sex was provided in all but six studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">9&#44;10&#44;13&#44;19&#44;24&#44;40</span></a> A total of 2069 patients were male &#40;50&#46;13&#37;&#41;&#44; and 2058 were female &#40;49&#46;87&#37;&#41;&#46; The age range of the patients with GT was 0&#8211;85 years&#44; with a mean age &#40;excluding nine studies&#41; of 42&#46;6 years&#46;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#8211;17&#44;20&#44;21&#44;37&#44;41</span></a> Two patients presented GT at birth&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a></p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0095" class="elsevierStylePara elsevierViewall">Tobacco use was recorded in seven studies<a class="elsevierStyleCrossRefs" href="#bib0285"><span class="elsevierStyleSup">15&#44;17&#44;20&#8211;23&#44;26</span></a> and alcohol use was recorded in 2&#44;<a class="elsevierStyleCrossRefs" href="#bib0315"><span class="elsevierStyleSup">21&#44;23</span></a> with 17&#46;45&#37; using tobacco &#40;217&#47;1243&#41; and 42&#46;2&#37; consuming alcohol &#40;187&#47;443&#41;&#46; These data corresponded to patients who were in their 30s&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Patient characteristics</span><p id="par0100" class="elsevierStylePara elsevierViewall">The GT symptoms were defined in 5 articles&#44; evaluating pain using the visual analog scale &#40;VAS&#41;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">20</span></a> and through the presence or absence of a burning sensation&#44;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;15&#44;18&#44;24&#44;27</span></a> which presented especially when consuming hot&#44; spicy&#44; acidic or bitter food or drink&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> In the analyzed adult samples&#44; these types of symptoms were reported at rates of 9&#46;2&#37; &#40;12&#47;130&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">15</span></a> 24&#46;5&#37; &#40;46&#47;188&#41;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> and 47&#37; in 2 studies &#40;45&#47;96 and 29&#47;47&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;15</span></a> The VAS scale was applied to 19 patients with GT&#44; with scores lower than 30 for 10 patients&#44; between 30 and 60 for 5 patients and greater than 60 for 4 patients&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">20</span></a> The complication of pain versus no pain without quantification was reported in 3 of 188 patients &#40;1&#46;59&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">The presence of dysgeusia in young and adolescent patients with GT was mostly from the perception of a bitter or sour taste&#44; with no statistically significant differences compared with a control group&#46;<a class="elsevierStyleCrossRef" href="#bib0410"><span class="elsevierStyleSup">40</span></a> Although GT can progress with symptoms in children&#44; it has been observed that&#44; by analyzing the Early Childhood Oral Health Impact Scale&#44; GT does not have a statistically significant effect on their quality of life&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">24</span></a></p><p id="par0110" class="elsevierStylePara elsevierViewall">In terms of the number of lesions in an article&#44; mild symptoms &#40;1 lesion&#41; were observed in 19&#37; of the sample &#40;59&#47;296&#41;&#44; moderate symptoms &#40;2&#8211;5 lesions&#41; were observed in 46&#46;3&#37; &#40;137&#47;296&#41; and severe symptoms &#40;more than 6 lesions&#41; were observed in 33&#37; &#40;100&#47;296&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">15</span></a> GT was most prevalent at the lateral edges of the tongue &#40;68&#46;6&#37;&#44; 129&#47;188&#41;&#44; followed by the anterior area &#40;58&#46;5&#37;&#44;110&#47;188&#41;&#44; dorsum &#40;42&#37;&#59; 79&#47;188&#41; and ventral face &#40;10&#46;6&#37;&#44; 20&#47;188&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a></p><p id="par0115" class="elsevierStylePara elsevierViewall">For patients with psoriasis&#44; the most common location for GT was on the dorsum &#40;20&#47;29&#41;&#44; followed by the lateral edges &#40;12&#47;39&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">12</span></a> The keratosis halo that accompanied the lesion was thinner for patients with GT and psoriasis&#44; providing a lesser burning sensation&#44; despite the onset of more lesions than in patients with GT without psoriasis&#44; results that were statistically significant&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">12</span></a></p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Psoriasis</span><p id="par0120" class="elsevierStylePara elsevierViewall">The prevalence of GT among patients with psoriasis of the present sample was 12&#46;5&#37; &#40;128&#47;1017&#41;&#44;<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">9&#44;10&#44;13&#44;14</span></a> and the prevalence of psoriasis among those with GT was 13&#46;5&#37; &#40;43&#47;318&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;15&#44;18</span></a> GT has also been reported more frequently among patients with psoriasis &#40;10&#46;3&#37;&#41; than in a control group &#40;2&#46;5&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">11</span></a> These findings were confirmed as statistically significant&#44;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">14</span></a> with an odds ratio of experiencing GT in psoriasis of 4&#46;76 &#40;95&#37; CI 2&#46;3&#8211;10&#46;8&#41;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">13</span></a> and 5&#46;0 &#40;95&#37; CI 1&#46;5&#8211;16&#46;8&#41; in 2 studies&#46;<a class="elsevierStyleCrossRef" href="#bib0255"><span class="elsevierStyleSup">9</span></a> Demographically&#44; GT has been reported more frequently in men with psoriasis<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;14</span></a> and older patients in a statistically significant manner&#46;<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">11</span></a> The clinical form most often associated with GT has been chronic plaque psoriasis &#40;15&#47;251&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">14</span></a> GT has been considered a marker of greater severity of psoriatic skin lesions using the Psoriasis Area and Severity Index&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">14</span></a> In terms of pathogenesis&#44; when the age at onset of psoriasis was less than 30 years&#44; the prevalence of GT was higher&#44;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">14</span></a> which was corroborated in a statistically significant manner in the study by Picciani et al&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">13</span></a></p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Allergies&#47;atopy&#47;asthma</span><p id="par0125" class="elsevierStylePara elsevierViewall">The presence of GT has been reported in patients with allergies &#40;31&#46;08&#37;&#44; 9&#47;27&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> The total number of patients with GT and a history of allergies was 81 &#40;81&#47;639&#59; 12&#46;6&#37;&#41;&#46; This prevalence ranged from 3&#46;1&#37; &#40;5&#47;166&#41; to 9&#46;2&#37; &#40;12&#47;130&#41; in the population of a single city&#44; who underwent a study in various diagnostic centers &#40;Bor&#229;s&#44; Sweden&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">15</span></a> In other geographical areas&#44; the relationship between patients with GT and a history of allergies is as follows&#58; 8&#47;58 &#40;8&#46;6&#37;&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0355"><span class="elsevierStyleSup">29</span></a> 23&#47;188 &#40;12&#46;2&#37;&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> 2&#47;13 &#40;15&#46;3&#37;&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0350"><span class="elsevierStyleSup">28</span></a> 12&#47;44 &#40;27&#46;2&#37;&#41;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a> and 19&#47;40 &#40;47&#46;5&#37;&#41;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">16</span></a>&#46; GT has also been reported &#40;in a statistically significant manner&#41; in patients with a history of atopy<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> and of asthma and rhinitis&#44; regardless of the presence of atopy&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">19</span></a> Goregen et al&#46; revealed the statistical significance between the positivity of the Stallergen skin test and the presence of GT&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">16</span></a> The types of allergies mentioned in patients with GT include food&#44; metals and chemical products&#44; pollen and animal skin&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">20</span></a></p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Psychological&#47;psychiatric factors</span><p id="par0130" class="elsevierStylePara elsevierViewall">In one study&#44; GT was present in 7&#46;6&#37; &#40;5&#47;66&#41; of the patients with psychological disorders&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> When analyzing the psychosomatic factors frequently related to GT&#44; the statistically significant presence of anxiety measured with the Hamilton Scale &#40;13&#47;44&#59; 29&#46;5&#37;&#41; has been observed&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a> Stress was present in 46&#46;2&#37; of a sample collected from 3 studies on patients with GT &#40;304&#47;657&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0325"><span class="elsevierStyleSup">23&#44;27</span></a> However&#44; another study found that GT was not associated with periods of depression &#40;7&#47;121&#59; 5&#46;78&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">22</span></a></p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Diabetes</span><p id="par0135" class="elsevierStylePara elsevierViewall">Wysocki and Daley observed a greater prevalence of GT among patients with juvenile diabetes &#40;7&#47;87&#59; 87&#37;&#41; and with HLA-B15&#44;<a class="elsevierStyleCrossRef" href="#bib0335"><span class="elsevierStyleSup">25</span></a> although these findings were not corroborated by other authors &#40;2&#47;65&#59; 3&#46;07&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Gastrointestinal diseases</span><p id="par0140" class="elsevierStylePara elsevierViewall">A prevalence of celiac disease of 15&#37; &#40;9&#47;60&#41; has been reported in patients with GT&#44; which was statistically significant despite the lack of this significance in the quantification of antigens HLA-DQ2 and HLA-DQ8&#44; which are frequently found in this disease&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">26</span></a> Other authors have not related GT to a history of gastrointestinal disease&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a></p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Hematological disorders</span><p id="par0145" class="elsevierStylePara elsevierViewall">B&#225;n&#243;czy et al&#46; detected the presence of anemia in 17&#37; &#40;12&#47;70&#41; of patients with LG&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a> Cigic et al&#46; observed statistically significant iron-deficiency among patients with GT compared with a control group&#44; but the authors did not specify whether these patients had celiac disease&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">26</span></a></p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Other diseases</span><p id="par0150" class="elsevierStylePara elsevierViewall">Although a significant relationship with systemic diseases is not always present&#44;<a class="elsevierStyleCrossRefs" href="#bib0315"><span class="elsevierStyleSup">21&#44;28</span></a> a number of authors have reported the absence of a relationship with certain diseases such as cardiovascular disease&#44;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> hepatic genitourinary disease&#44;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> thyroid diseases<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> and dyslipidemia&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> A relationship with systemic diseases has also not been observed in the pediatric population&#46;<a class="elsevierStyleCrossRef" href="#bib0355"><span class="elsevierStyleSup">29</span></a></p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Association between geographic tongue and oral diseases</span><p id="par0155" class="elsevierStylePara elsevierViewall">The presence of <span class="elsevierStyleItalic">Helicobacter pylori</span> was reported in 1 of 37 patients with GT&#46;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">31</span></a> The statistically significant prevalence of candidiasis was reported in 14&#46;2&#37; of patients with GT &#40;10&#47;70&#41;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a> and in smaller series &#40;90&#37;&#59; 9&#47;10&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">32</span></a> In larger GT samples&#44; mycosis was diagnosed in 2&#46;12&#37; of patients &#40;5&#47;235&#41;<a class="elsevierStyleCrossRef" href="#bib0360"><span class="elsevierStyleSup">30</span></a>&#59; the mean involvement was therefore 7&#46;61&#37; &#40;24&#47;315&#41;&#46;</p><p id="par0160" class="elsevierStylePara elsevierViewall">Another reported infection was caries&#44; with a higher statistically significant index of decayed&#44; missing and filled teeth among patients with GT than in a control group of adults&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a> Variations in the quantity of saliva secretion were not recorded&#44;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">32</span></a> and their pH was qualitatively more acidic when compared with a healthy control group&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">32</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">GT was concomitant with fissured tongue in up to 49&#46;2&#37; of a sample<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">15</span></a> and has been reported in a statistically significant manner in other studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0295"><span class="elsevierStyleSup">17&#44;18&#44;32&#44;35</span></a> Although a high rate of the 2 diseases has been found in the pediatric population&#44;<a class="elsevierStyleCrossRef" href="#bib0355"><span class="elsevierStyleSup">29</span></a> a statistically significant association between GT and fissured tongue has not been observed in this age group&#46;<a class="elsevierStyleCrossRefs" href="#bib0350"><span class="elsevierStyleSup">28&#44;33</span></a> The association between GT and fissured tongue among siblings was manifested in 17&#46;7&#37; of patients &#40;14&#47;79&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0400"><span class="elsevierStyleSup">38</span></a> Rahamimoff and Muhsma<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">39</span></a> described the progression of GT toward fissured tongue in a number of patients in the third year of monitoring &#40;37&#46;5&#37;&#59; 140&#47;373&#41;&#46;</p><p id="par0170" class="elsevierStylePara elsevierViewall">GT has been diagnosed in association with serrated tongue &#40;20&#46;9&#37;&#59; 62&#47;296&#41;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">15</span></a> and in a statistically significant manner among patients with burning mouth syndrome &#40;32&#46;9&#37;&#59; 53&#47;161&#41; when comparing them with patients with temporomandibular dysfunction&#46;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">34</span></a></p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Cytological and histological characteristics</span><p id="par0175" class="elsevierStylePara elsevierViewall">The cytological peculiarities of GT were described by Scariot et al&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a> who specified a Papanicolaou grade of 2&#44; i&#46;e&#46; a normal smear with inflammatory changes&#46; The authors distinguished the increase in nuclear size&#44; thereby increasing its relationship with respect to the cytoplasm&#46; The nuclei showed a perinuclear halo due to its thickening of binuclear appearance&#46; The cytological analysis performed on 96 patients to rule out candidiasis did not report the findings of this test&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">12</span></a></p><p id="par0180" class="elsevierStylePara elsevierViewall">Biopsy studies and sample staining with hematoxylin-eosin were performed for 37 patients&#46; Banoczy et al&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a> described 2 areas&#46; In the area corresponding to the red patches&#44; there was greater intracellular and extracellular edema of the epithelial acanthosis and an inflammatory infiltrate&#44; mainly of neutrophils&#46; This inflammatory infiltrate was also observed in the more superficial layers of the epithelium&#44; forming microabscesses &#40;Munro&#39;s abscesses&#41;&#46; The center of the atrophy corresponds histologically with epithelial exfoliation triggered by the microabscesses&#44; identifying with the absence of filiform papillae and the parakeratotic layer&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">10</span></a></p></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Treatment</span><p id="par0185" class="elsevierStylePara elsevierViewall">The treatments come from 3 articles on 101 patients&#46; Banoczy et al&#46; proposed the alternative of vitamins A&#44; B&#44; C and B<span class="elsevierStyleInf">12</span>&#44; iron and sex hormone replenishment&#44; as well as antifungal regimens&#44; although these were effective in &#60;3&#37; of the treated patients&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a> Another 3 patients with pain &#40;out of 188&#41; were treated with topical antihistamines&#44; the results of which were not reported&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> The third article was a comparative clinical trial between the topical use of 0&#46;1&#37; triamcinolone acetonide alone and the combination with 0&#46;05&#37; retinoic acid&#44; twice daily&#44; for 10 days in symptomatic GT &#40;without specifying its quantification&#41;&#46; Of their results from 28 patients&#44; the authors noted that both treatments provided clinical improvement&#44; without showing significant differences in the use of the corticosteroid in isolation or combined with retinoid&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">41</span></a></p></span></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0140">Discussion</span><p id="par0190" class="elsevierStylePara elsevierViewall">The present systematic review covers 33 studies developed using 4 methodological designs&#58; cases and controls &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>19&#41;&#44; cross-sectional studies &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>11&#41;&#44; cohort &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2&#41; and a randomized clinical trial&#46; A total of 4998 patients with GT were analyzed from the perspective of their clinical manifestations&#44; diagnosis and treatment&#46;</p><p id="par0195" class="elsevierStylePara elsevierViewall">The various authors included in this review followed the classical definition of GT proposed by Hume&#46;<a class="elsevierStyleCrossRef" href="#bib0235"><span class="elsevierStyleSup">5</span></a> Thus&#44; GT appears as irregular erythematous patches due to a loss of filiform papillae&#44; typically circumscribed by bands or white keratotic lines that are slightly raised&#44; preserving the fungiform papillae&#44; which have a self-limiting and migratory character&#46;</p><p id="par0200" class="elsevierStylePara elsevierViewall">GT is a disorder that has an interchangeable prevalence between the sexes&#44; whose ratio is approximately 1 to 1 &#40;50&#46;13&#37; and 49&#46;87&#37; for males and females&#44; respectively&#41;&#46; Tobacco use was considered in 7 studies&#44; reporting tobacco consumption by 17&#46;45&#37; of registered patients &#40;217&#47;1243&#41;&#46; The prevalence of alcohol consumption was more relevant&#44; however&#44; although the sample size for their preparation was smaller &#40;42&#46;2&#37;&#59; 187&#47;443&#41;&#46;</p><p id="par0205" class="elsevierStylePara elsevierViewall">The symptom criteria were difficult to interpret because the degree of pain &#40;measured with the VAS&#41; was only considered in 19 patients&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">20</span></a> Another symptom criterion was expressed through the presence or absence of a burning sensation&#44; a symptom that defines burning mouth syndrome in the absence of clinical and pathological signs&#46;<a class="elsevierStyleCrossRef" href="#bib0420"><span class="elsevierStyleSup">42</span></a> This symptom appeared in 9&#46;2&#37; to 47&#37; of patients with GT<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;15&#44;20</span></a> and in 32&#46;9&#37; of patients with burning mouth syndrome&#46;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">34</span></a></p><p id="par0210" class="elsevierStylePara elsevierViewall">The patients with GT did not report total dysgeusia in a statistically significant manner&#46;<a class="elsevierStyleCrossRef" href="#bib0410"><span class="elsevierStyleSup">40</span></a> This result could be due to the concept of GT&#44; because lingual atrophy mostly affects the filiform papillae &#40;papillae that are not involved in taste&#41; and preserves the fungiform papillae that contain the taste buds&#46;</p><p id="par0215" class="elsevierStylePara elsevierViewall">The extensive documentation that examined the association between GT and other ailments requires an understanding of its comorbidity with various systemic and local conditions of the oral cavity&#46; This understanding helps focus on whether this condition involves an oral disease with systemic repercussion or an oral manifestation of a systemic disease&#46; Thus&#44; the link between GT psoriasis&#44; between GT and certain allergies and between GT and certain psychological disorders can be considered bidirectional&#46; Patients with GT have been observed to have psoriasis &#40;at a mean rate of 12&#46;5&#37; of the sample<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">9&#44;10&#44;13&#44;14</span></a>&#41;&#44; allergies &#40;12&#46;6&#37;<a class="elsevierStyleCrossRefs" href="#bib0285"><span class="elsevierStyleSup">15&#44;16&#44;18&#44;21&#44;28</span></a>&#41; and anxiety &#40;29&#46;5&#37;&#59; 13&#47;44<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a>&#41;&#46; GT manifested in 13&#46;5&#37; of patients with psoriasis&#44;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;15&#44;18</span></a> in 31&#46;08&#37; &#40;9&#47;27&#41;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> of patients with allergies and in 7&#46;6&#37; &#40;5&#47;66&#41; of those with psychological disorders&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> Other diseases that can be present in GT include diabetes&#44; iron-deficiency anemia and celiac disease&#46;</p><p id="par0220" class="elsevierStylePara elsevierViewall">Two of the most prevalent oral infections reported in patients with GT are caries and oral candidiasis&#46; The statistically significant evidence of caries in patients with GT&#44; when compared with a healthy control group&#44; is explained by the qualitative findings of a more acidic saliva&#44; thereby promoting the cariogenic process despite the lack of hyposalivation &#40;quantitative reduction in saliva&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">32</span></a> Oral candidiasis was manifested in 7&#46;6&#37; &#40;24&#47;315&#41; of the patients with GT&#46; The differential diagnosis of these 2 diseases can be initially established through examination&#46; The keratotic lesions that define GT cannot be eliminated by scraping and normally self-resolve&#44; although they can reoccur within a variable period&#46;</p><p id="par0225" class="elsevierStylePara elsevierViewall">The previous description of GT&#44; along with the self-limiting behavior&#44; helps with the clinical diagnosis&#46; Only 1&#46;19&#37; of the analyzed sample was examined using complementary techniques of cytological diagnosis and biopsy&#46; In atypical forms&#44; a cytological study may be used to confirm the clinical diagnosis&#46; Despite only being used in 17 samples&#44; the cytological description can define the disease due to the inflammatory characteristics &#40;Papanicolaou type 2&#41;&#44; with the characteristic image of nuclear demarcation&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a> In rare cases&#44; a biopsy that identifies the Munro abscesses may be performed&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a></p><p id="par0230" class="elsevierStylePara elsevierViewall">Given the chronicity and fear of cancer generated in the patient by asymptomatic GT lesions&#44; the first step is to inform the patient of the nature and benign behavior of the lesion&#44;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a> reserving drug treatment for lesions that the patient reports as painful&#46; Furthermore&#44; the only relevant clinical trial that has confirmed a therapeutic response proposed the application of 0&#46;1&#37; triamcinolone acetonide in orabase &#40;combined or not with 0&#46;05&#37; retinoic acid&#41;&#44; twice daily&#44; for 10 days&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">41</span></a><a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a> shows the clinical management of the diagnosis and therapy resulting from the present review&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0235" class="elsevierStylePara elsevierViewall">There are a number of limitations in this review&#46; The number of studies was small&#44; which was mainly due to the lack of a GT definition in the methodology&#44; which prompted us to exclude 38 articles&#46; No less important was the heterogeneity in the studies&#8217; design and objectives&#44; which is why their comparative analysis was not performed&#46; In most of the research studies&#44; the focus was on the comorbidity with specific diseases&#44; lacking documentation related to the symptoms and therapy&#46;</p><p id="par0240" class="elsevierStylePara elsevierViewall">Future studies should aim at completing the therapeutic understanding of GT&#44; as well as the implication of the presence of GT as a marker of severity for the comorbid diseases proposed in the present study&#44; such as psoriasis&#44; various allergies and anxiety&#46;</p></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0145">Conflicts of interest</span><p id="par0245" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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              "titulo" => "Introduction"
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          "identificador" => "xpalclavsec1054263"
          "titulo" => "Keywords"
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          "titulo" => "Resumen"
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            0 => array:2 [
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              "titulo" => "Introducci&#243;n"
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            1 => array:2 [
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              "titulo" => "M&#233;todos"
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            2 => array:2 [
              "identificador" => "abst0035"
              "titulo" => "Resultados"
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              "identificador" => "abst0040"
              "titulo" => "Conclusiones"
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        3 => array:2 [
          "identificador" => "xpalclavsec1054264"
          "titulo" => "Palabras clave"
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        4 => array:2 [
          "identificador" => "sec0005"
          "titulo" => "Background"
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          "identificador" => "sec0010"
          "titulo" => "Materials and methods"
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          "titulo" => "Results"
          "secciones" => array:12 [
            0 => array:2 [
              "identificador" => "sec0020"
              "titulo" => "Demographic characteristics and toxic habits"
            ]
            1 => array:2 [
              "identificador" => "sec0025"
              "titulo" => "Patient characteristics"
            ]
            2 => array:2 [
              "identificador" => "sec0030"
              "titulo" => "Psoriasis"
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            3 => array:2 [
              "identificador" => "sec0035"
              "titulo" => "Allergies&#47;atopy&#47;asthma"
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            4 => array:2 [
              "identificador" => "sec0040"
              "titulo" => "Psychological&#47;psychiatric factors"
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            5 => array:2 [
              "identificador" => "sec0045"
              "titulo" => "Diabetes"
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            6 => array:2 [
              "identificador" => "sec0050"
              "titulo" => "Gastrointestinal diseases"
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            7 => array:2 [
              "identificador" => "sec0055"
              "titulo" => "Hematological disorders"
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            8 => array:2 [
              "identificador" => "sec0060"
              "titulo" => "Other diseases"
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            9 => array:2 [
              "identificador" => "sec0065"
              "titulo" => "Association between geographic tongue and oral diseases"
            ]
            10 => array:2 [
              "identificador" => "sec0070"
              "titulo" => "Cytological and histological characteristics"
            ]
            11 => array:2 [
              "identificador" => "sec0075"
              "titulo" => "Treatment"
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          "titulo" => "Discussion"
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          "titulo" => "References"
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    "pdfFichero" => "main.pdf"
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    "fechaRecibido" => "2018-03-12"
    "fechaAceptado" => "2018-05-12"
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        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Keywords"
          "identificador" => "xpalclavsec1054263"
          "palabras" => array:6 [
            0 => "Benign migratory glossitis"
            1 => "Geographic tongue"
            2 => "Comorbidity"
            3 => "Caries"
            4 => "Treatment"
            5 => "Systematic review"
          ]
        ]
      ]
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          "clase" => "keyword"
          "titulo" => "Palabras clave"
          "identificador" => "xpalclavsec1054264"
          "palabras" => array:6 [
            0 => "Glositis migratoria benigna"
            1 => "Lengua geogr&#225;fica"
            2 => "Comorbilidad"
            3 => "Caries"
            4 => "Tratamiento"
            5 => "Revisi&#243;n sistem&#225;tica"
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    "resumen" => array:2 [
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Geographic tongue &#40;GT&#41; is a lesion of unknown origin associated with systemic diseases and therefore involves multidisciplinary care&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">We performed a literature search of the PubMed&#44; EMBASE&#44; Web of Science and Cochrane databases&#46; The selection criteria were consistent with the Preferred Reporting Items for Systematic Reviews protocol&#46; We considered as inclusion criteria journal articles designed on cases of cohorts&#44; cross-sectional studies&#44; cases and controls and randomized clinical trials in the pathogenic&#44; clinical and therapeutic context&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">A total of 33 articles met these criteria&#46; We analyzed 4998 patients with GT&#44; with an age range of 0&#8211;85 years&#44; and the burning sensation symptom was present in 9&#46;2&#8211;47&#37; of these patients&#46; The GT diagnosis was clinical in 98&#46;81&#37; of the cases&#44; and GT displayed an association with psoriasis&#44; allergies and anxiety&#46; <span class="elsevierStyleItalic">Candida</span> infection was present in 7&#46;6&#37; &#40;24&#47;315&#41; of the cases&#44; and the presence of caries was statistically significant&#46; The only analyzed clinical trial proposed treatment through the topical application of 0&#46;1&#37; triamcinolone acetonide combined or not with 0&#46;05&#37; retinoic acid&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">The diagnosis of GT is mainly clinical&#46; GT is an asymptomatic disorder that usually requires no treatment&#46; Understanding GT is necessary due to the comorbid intraoral and extraoral diseases that accompany the condition&#46;</p></span>"
        "secciones" => array:4 [
          0 => array:2 [
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            "titulo" => "Introduction"
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        "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Introducci&#243;n</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">La lengua geogr&#225;fica &#40;LG&#41; es una lesi&#243;n de origen desconocido asociada a enfermedades sist&#233;micas&#44; por lo que su atenci&#243;n plantea una validez multidisciplinar&#46;</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">M&#233;todos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">La b&#250;squeda de los art&#237;culos fue realizada a partir de las bases de datos de PubMed&#44; Embase&#44; Web of Science y Cochrane Database&#46; Los criterios de selecci&#243;n fueron en concordancia con el protocolo <span class="elsevierStyleItalic">Preferred Reporting Items for Systematic Reviews</span>&#46; Hemos considerado como criterios de inclusi&#243;n los art&#237;culos en revistas dise&#241;ados sobre casos de cohortes&#44; estudios transversales&#44; casos y controles&#44; y ensayos cl&#237;nicos aleatorizados en el contexto patog&#233;nico&#44; cl&#237;nico y terap&#233;utico&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Un total de 33 art&#237;culos cumplieron dichos criterios&#46; El n&#250;mero de pacientes analizados con LG fue de 4&#46;998 con un rango de edad entre los 0 y 85 a&#241;os&#46; La sintomatolog&#237;a de sensaci&#243;n de ardor estuvo presente en entre el 9&#44;2&#37; y el 47&#37; de los pacientes&#46; El diagn&#243;stico de la LG fue cl&#237;nico en el 98&#44;81&#37;&#46; Se ha manifestado en la LG una asociaci&#243;n con la psoriasis&#44; las alergias y la ansiedad&#46; La infecci&#243;n por <span class="elsevierStyleItalic">Candida</span> se present&#243; en el 7&#44;6&#37; &#40;24&#47;315&#41; y la presencia de caries fue estad&#237;sticamente significativa&#46; El &#250;nico ensayo cl&#237;nico analizado propone como tratamiento el uso t&#243;pico de acet&#243;nido de triamcinolona al 0&#44;1&#37;&#44; combinado o no con el &#225;cido retinoico al 0&#44;05&#37;&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusiones</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">El diagn&#243;stico de la lengua geogr&#225;fica es principalmente cl&#237;nico&#46; Es un desorden asintom&#225;tico que habitualmente no requiere tratamiento&#46; El conocimiento de la LG es necesario debido a las enfermedades com&#243;rbidas intra y extraorales que la acompa&#241;an&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Gonz&#225;lez-&#193;lvarez L&#44; Garc&#237;a-Pola MJ&#44; Garc&#237;a-Mart&#237;n JM&#46; Lengua geogr&#225;fica&#58; factores predisponentes&#44; diagn&#243;stico y tratamiento&#46; Revisi&#243;n sistem&#225;tica&#46; Rev Cl&#237;n Espa&#241;ol&#46; 2018&#59;218&#58;481&#8211;488&#46;</p>"
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          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Literature search algorithm according to PRISMA criteria&#46;</p>"
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          "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Management and treatment algorithm for patients with geographic tongue&#46;</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Patients with GT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">4998&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Sex&#58; male&#47;female&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">2069&#47;2058&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Age &#40;range&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">0&#8211;85 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Tobacco use&#44; yes&#47;no&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">217&#47;926 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>1243&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Alcohol use&#44; yes&#47;no&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">187&#47;256 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>443&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">GT<span class="elsevierStyleHsp" style=""></span>&#43;<span class="elsevierStyleHsp" style=""></span>FT&#44; yes&#47;no&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">890&#47;2611 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>3501&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Oral candidiasis&#44; &#177;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">24&#47;291 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>315&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Burning sensation&#44; yes&#47;no&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">132&#47;461 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>593&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Visual analog scale &#40;VAS&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">VAS<span class="elsevierStyleHsp" style=""></span>&#60;30 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>10&#41;&#59; VAS 30&#8211;60 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#41;&#59; VAS<span class="elsevierStyleHsp" style=""></span>&#8805;<span class="elsevierStyleHsp" style=""></span>60 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Severity according to the no&#46; of lesions&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Mild&#58; 100 &#40;23&#46;5&#37;&#41;&#59; moderate&#58; 214 &#40;50&#46;2&#37;&#41;&#59; severe&#58; 112 &#40;26&#46;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Treatments&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">0&#46;01&#37; triamcinolone acetonide alone or in combination with 0&#46;05&#37; retinoic acid &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>28&#41;<br>Iron plus vitamin B<span class="elsevierStyleInf">12</span> &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>25&#41;<br>Vitamin A &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>11&#41;<br>Vitamin C &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>6&#41;<br>Sex hormones &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>3&#41;<br>Antifungals &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>12&#41;<br>Topical antihistamines &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>3&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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Review
Geographic tongue: Predisposing factors, diagnosis and treatment. A systematic review
Lengua geográfica: factores predisponentes, diagnóstico y tratamiento. Revisión sistemática
L. González-Álvarez, M.J. García-Pola
Corresponding author
mjgarcia@uniovi.es

Corresponding author.
, J.M. García-Martín
Departamento de Cirugía y Especialidades Médico-Quirúrgicas, Facultad de Medicina, Universidad de Oviedo, Oviedo, Spain
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        "autoresLista" => "L&#46; Gonz&#225;lez-&#193;lvarez, M&#46;J&#46; Garc&#237;a-Pola, J&#46;M&#46; Garc&#237;a-Mart&#237;n"
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            "entidad" => "Departamento de Cirug&#237;a y Especialidades M&#233;dico-Quir&#250;rgicas&#44; Facultad de Medicina&#44; Universidad de Oviedo&#44; Oviedo&#44; Spain"
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      "es" => array:1 [
        "titulo" => "Lengua geogr&#225;fica&#58; factores predisponentes&#44; diagn&#243;stico y tratamiento&#46; Revisi&#243;n sistem&#225;tica"
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          "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Management and treatment algorithm for patients with geographic tongue&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Background</span><p id="par0005" class="elsevierStylePara elsevierViewall">Geographic tongue &#40;GT&#41; or benign migratory glossitis is a condition characterized by the appearance of 1 or more atrophic areas on the dorsum and lateral edges of the tongue due to the absence of filiform papillae&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">1</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">Precisely defining the epidemiological data regarding the condition&#39;s incidence is difficult&#44; given that different rates are reported within the same country&#46; In Sweden&#44; for example&#44; there have been fluctuations in sample size and selection and in the year the study was conducted&#44; with reported prevalence rates in the general population of up to 8&#46;45&#37;&#46;<a class="elsevierStyleCrossRefs" href="#bib0220"><span class="elsevierStyleSup">2&#8211;4</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">GT is clinically classified as &#40;a&#41; active or typical&#44; when demarcated by a white &#40;or intense red&#41;&#44; slightly elevated&#44; keratotic edge and &#40;b&#41; passive&#44; abortive or atypical if this edge is missing or disappears before completing the GT formation process&#46; Depending on its dynamism&#44; GT can also be classified as migratory or fixed&#46; Lesions are occasionally found in other locations of the oral cavity and are commonly known as migratory stomatitis&#44; geographical stomatitis or ectopic GT&#46;<a class="elsevierStyleCrossRef" href="#bib0235"><span class="elsevierStyleSup">5</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">The cause of GT is still unknown but has been reported in patients with a family history of this disease and is frequently found in patients with underlying immune diseases&#44; diseases with systemic repercussions and after administering various treatments&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">6</span></a> The lesion is dynamic&#44; because it changes morphology within hours&#44; is self-limiting by healing in days or weeks and can reoccur within a variable period&#46;<a class="elsevierStyleCrossRef" href="#bib0245"><span class="elsevierStyleSup">7</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">The objective of this systematic review was to search for information on the comorbid diseases of GT to develop an updated algorithm for its management&#44; which can be applied as guidelines or a reference for practitioners who most often diagnose this disease&#46; To this end&#44; we selected observational&#44; cross-sectional studies&#44; cohort studies&#44; case&#8211;control studies and clinical trials on the diagnosis of GT and its associated diseases and its therapeutic alternatives&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Materials and methods</span><p id="par0030" class="elsevierStylePara elsevierViewall">This section was planned by following the Preferred Reporting Items for Systematic Reviews and Meta-analyses system criteria&#46;<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">8</span></a></p><p id="par0035" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Question at hand</span>&#58; Is there a relationship between GT and some disease that facilitates its management&#44; prevention and treatment&#63;</p><p id="par0040" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Eligibility criteria</span>&#58; The condition of GT should be defined &#40;1&#41; as the presence of a lesion with atrophy of the lingual filiform papillae surrounded by a white-yellowish border<a class="elsevierStyleCrossRefs" href="#bib0215"><span class="elsevierStyleSup">1&#44;5</span></a> or &#40;2&#41; by referring to its source&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">We also considered as inclusion criteria the articles published in journals&#44; designed on cross-sectional studies&#44; cohort studies&#44; case&#8211;control studies and randomized clinical trials&#46; These articles had to be written in English&#44; accompanied or not&#44; by another language&#46; As exclusion criteria&#44; we ruled out prevalence &#40;or epidemiological&#41; studies&#44; reviews&#44; letters to the editor&#44; and contributions to congresses &#40;conferences&#44; presentations and posters&#41;&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Search strategy</span>&#58; The search was conducted on the PubMed&#44; EMBASE&#44; Web of Science and Cochrane databases&#46; The search strategy included the following keywords</p><p id="par0055" class="elsevierStylePara elsevierViewall">Geographic tongue and Benign migratory glossitis&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Study selection</span>&#58; The publications were initially identified by title and author to exclude duplicates&#46; Using the title&#44; abstract and&#47;or directly from the full text&#44; we selected the potentially relevant articles related to diseases associated with GT&#44; its diagnosis&#44; symptoms and treatment&#46; The screening process for the articles was performed by two authors &#40;GA and GP&#41;&#44; whose agreement rate was 97&#46;2&#37;&#46; The articles that met the eligibility criteria were fully read and analyzed by the three authors&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Data recording</span>&#58; We recorded data on the author&#40;s&#41;&#8217; last name and year of publication&#46; We also included the following variables&#58; the number of examined patients with GT&#44; their age&#44; sex&#44; symptoms and associated diseases&#46; The complementary diagnostic technique &#40;cytology and biopsy&#41; and treatment prescribed was also provided&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Prioritization of results</span>&#58; We described the results covering the context of prevalence of the associated diseases&#44; their clinical manifestation&#44; diagnosis and therapeutics&#46; The data analysis was descriptive&#44; providing values on frequency&#44; ranges and mean&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Risk of bias in the studies and between the studies</span>&#58; Due to the plurality of the objectives of each research study and the clinical&#8211;pathological diversity associated with the participants of these studies&#44; we did not evaluate the individual quality or interstudy quality&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Results</span><p id="par0080" class="elsevierStylePara elsevierViewall">Initially&#44; the PubMed search found 1296 studies &#40;1951 to October 31&#44; 2017&#41;&#44; EMBASE provided 983 &#40;1952 to October 31&#44; 2017&#41;&#44; Web of Science provided 468 &#40;1910 to December 31&#44; 2017&#41;&#44; and the Cochrane database included 11 articles &#40;1964 to 2017&#41;&#44; resulting in a total of 2758 publications&#46; After discarding the duplicates by title and author&#44; we reduced the sample to 1021 articles&#46;</p><p id="par0085" class="elsevierStylePara elsevierViewall">As we mentioned&#44; we first differentiated the titles and abstracts and excluded publications not directly related to the topic &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>939&#41;&#46; After reading the abstracts &#40;or full text in cases where the abstract provided insufficient information or was not available&#41;&#44; we selected 82 publications&#46; Of these&#44; we discarded 49&#44; 11 for not meeting the inclusion criteria and 38 for not defining the GT disease&#46; Ultimately&#44; 33 studies met the inclusion criteria&#44; referencing 12 different authors to express the concept of GT&#46; The selected articles were published between 1956 and 2017&#46; <a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a> shows the flow diagram for the study selection&#46;<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">9&#8211;41</span></a></p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Demographic characteristics and toxic habits</span><p id="par0090" class="elsevierStylePara elsevierViewall">A total of 4998 patients were analyzed with GT in the sample of 33 articles that made up the review&#46; The studies&#8217; sample sizes ranged from 10<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">32</span></a> to 801 cases of GT &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0385"><span class="elsevierStyleSup">35</span></a> The patients&#8217; sex was provided in all but six studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">9&#44;10&#44;13&#44;19&#44;24&#44;40</span></a> A total of 2069 patients were male &#40;50&#46;13&#37;&#41;&#44; and 2058 were female &#40;49&#46;87&#37;&#41;&#46; The age range of the patients with GT was 0&#8211;85 years&#44; with a mean age &#40;excluding nine studies&#41; of 42&#46;6 years&#46;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#8211;17&#44;20&#44;21&#44;37&#44;41</span></a> Two patients presented GT at birth&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a></p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0095" class="elsevierStylePara elsevierViewall">Tobacco use was recorded in seven studies<a class="elsevierStyleCrossRefs" href="#bib0285"><span class="elsevierStyleSup">15&#44;17&#44;20&#8211;23&#44;26</span></a> and alcohol use was recorded in 2&#44;<a class="elsevierStyleCrossRefs" href="#bib0315"><span class="elsevierStyleSup">21&#44;23</span></a> with 17&#46;45&#37; using tobacco &#40;217&#47;1243&#41; and 42&#46;2&#37; consuming alcohol &#40;187&#47;443&#41;&#46; These data corresponded to patients who were in their 30s&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Patient characteristics</span><p id="par0100" class="elsevierStylePara elsevierViewall">The GT symptoms were defined in 5 articles&#44; evaluating pain using the visual analog scale &#40;VAS&#41;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">20</span></a> and through the presence or absence of a burning sensation&#44;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;15&#44;18&#44;24&#44;27</span></a> which presented especially when consuming hot&#44; spicy&#44; acidic or bitter food or drink&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> In the analyzed adult samples&#44; these types of symptoms were reported at rates of 9&#46;2&#37; &#40;12&#47;130&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">15</span></a> 24&#46;5&#37; &#40;46&#47;188&#41;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> and 47&#37; in 2 studies &#40;45&#47;96 and 29&#47;47&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;15</span></a> The VAS scale was applied to 19 patients with GT&#44; with scores lower than 30 for 10 patients&#44; between 30 and 60 for 5 patients and greater than 60 for 4 patients&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">20</span></a> The complication of pain versus no pain without quantification was reported in 3 of 188 patients &#40;1&#46;59&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">The presence of dysgeusia in young and adolescent patients with GT was mostly from the perception of a bitter or sour taste&#44; with no statistically significant differences compared with a control group&#46;<a class="elsevierStyleCrossRef" href="#bib0410"><span class="elsevierStyleSup">40</span></a> Although GT can progress with symptoms in children&#44; it has been observed that&#44; by analyzing the Early Childhood Oral Health Impact Scale&#44; GT does not have a statistically significant effect on their quality of life&#46;<a class="elsevierStyleCrossRef" href="#bib0330"><span class="elsevierStyleSup">24</span></a></p><p id="par0110" class="elsevierStylePara elsevierViewall">In terms of the number of lesions in an article&#44; mild symptoms &#40;1 lesion&#41; were observed in 19&#37; of the sample &#40;59&#47;296&#41;&#44; moderate symptoms &#40;2&#8211;5 lesions&#41; were observed in 46&#46;3&#37; &#40;137&#47;296&#41; and severe symptoms &#40;more than 6 lesions&#41; were observed in 33&#37; &#40;100&#47;296&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">15</span></a> GT was most prevalent at the lateral edges of the tongue &#40;68&#46;6&#37;&#44; 129&#47;188&#41;&#44; followed by the anterior area &#40;58&#46;5&#37;&#44;110&#47;188&#41;&#44; dorsum &#40;42&#37;&#59; 79&#47;188&#41; and ventral face &#40;10&#46;6&#37;&#44; 20&#47;188&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a></p><p id="par0115" class="elsevierStylePara elsevierViewall">For patients with psoriasis&#44; the most common location for GT was on the dorsum &#40;20&#47;29&#41;&#44; followed by the lateral edges &#40;12&#47;39&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">12</span></a> The keratosis halo that accompanied the lesion was thinner for patients with GT and psoriasis&#44; providing a lesser burning sensation&#44; despite the onset of more lesions than in patients with GT without psoriasis&#44; results that were statistically significant&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">12</span></a></p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Psoriasis</span><p id="par0120" class="elsevierStylePara elsevierViewall">The prevalence of GT among patients with psoriasis of the present sample was 12&#46;5&#37; &#40;128&#47;1017&#41;&#44;<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">9&#44;10&#44;13&#44;14</span></a> and the prevalence of psoriasis among those with GT was 13&#46;5&#37; &#40;43&#47;318&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;15&#44;18</span></a> GT has also been reported more frequently among patients with psoriasis &#40;10&#46;3&#37;&#41; than in a control group &#40;2&#46;5&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">11</span></a> These findings were confirmed as statistically significant&#44;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">14</span></a> with an odds ratio of experiencing GT in psoriasis of 4&#46;76 &#40;95&#37; CI 2&#46;3&#8211;10&#46;8&#41;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">13</span></a> and 5&#46;0 &#40;95&#37; CI 1&#46;5&#8211;16&#46;8&#41; in 2 studies&#46;<a class="elsevierStyleCrossRef" href="#bib0255"><span class="elsevierStyleSup">9</span></a> Demographically&#44; GT has been reported more frequently in men with psoriasis<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;14</span></a> and older patients in a statistically significant manner&#46;<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">11</span></a> The clinical form most often associated with GT has been chronic plaque psoriasis &#40;15&#47;251&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">14</span></a> GT has been considered a marker of greater severity of psoriatic skin lesions using the Psoriasis Area and Severity Index&#46;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">14</span></a> In terms of pathogenesis&#44; when the age at onset of psoriasis was less than 30 years&#44; the prevalence of GT was higher&#44;<a class="elsevierStyleCrossRef" href="#bib0280"><span class="elsevierStyleSup">14</span></a> which was corroborated in a statistically significant manner in the study by Picciani et al&#46;<a class="elsevierStyleCrossRef" href="#bib0275"><span class="elsevierStyleSup">13</span></a></p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Allergies&#47;atopy&#47;asthma</span><p id="par0125" class="elsevierStylePara elsevierViewall">The presence of GT has been reported in patients with allergies &#40;31&#46;08&#37;&#44; 9&#47;27&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> The total number of patients with GT and a history of allergies was 81 &#40;81&#47;639&#59; 12&#46;6&#37;&#41;&#46; This prevalence ranged from 3&#46;1&#37; &#40;5&#47;166&#41; to 9&#46;2&#37; &#40;12&#47;130&#41; in the population of a single city&#44; who underwent a study in various diagnostic centers &#40;Bor&#229;s&#44; Sweden&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">15</span></a> In other geographical areas&#44; the relationship between patients with GT and a history of allergies is as follows&#58; 8&#47;58 &#40;8&#46;6&#37;&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0355"><span class="elsevierStyleSup">29</span></a> 23&#47;188 &#40;12&#46;2&#37;&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> 2&#47;13 &#40;15&#46;3&#37;&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0350"><span class="elsevierStyleSup">28</span></a> 12&#47;44 &#40;27&#46;2&#37;&#41;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a> and 19&#47;40 &#40;47&#46;5&#37;&#41;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">16</span></a>&#46; GT has also been reported &#40;in a statistically significant manner&#41; in patients with a history of atopy<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> and of asthma and rhinitis&#44; regardless of the presence of atopy&#46;<a class="elsevierStyleCrossRef" href="#bib0305"><span class="elsevierStyleSup">19</span></a> Goregen et al&#46; revealed the statistical significance between the positivity of the Stallergen skin test and the presence of GT&#46;<a class="elsevierStyleCrossRef" href="#bib0290"><span class="elsevierStyleSup">16</span></a> The types of allergies mentioned in patients with GT include food&#44; metals and chemical products&#44; pollen and animal skin&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">20</span></a></p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Psychological&#47;psychiatric factors</span><p id="par0130" class="elsevierStylePara elsevierViewall">In one study&#44; GT was present in 7&#46;6&#37; &#40;5&#47;66&#41; of the patients with psychological disorders&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> When analyzing the psychosomatic factors frequently related to GT&#44; the statistically significant presence of anxiety measured with the Hamilton Scale &#40;13&#47;44&#59; 29&#46;5&#37;&#41; has been observed&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a> Stress was present in 46&#46;2&#37; of a sample collected from 3 studies on patients with GT &#40;304&#47;657&#41;&#46;<a class="elsevierStyleCrossRefs" href="#bib0325"><span class="elsevierStyleSup">23&#44;27</span></a> However&#44; another study found that GT was not associated with periods of depression &#40;7&#47;121&#59; 5&#46;78&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0320"><span class="elsevierStyleSup">22</span></a></p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Diabetes</span><p id="par0135" class="elsevierStylePara elsevierViewall">Wysocki and Daley observed a greater prevalence of GT among patients with juvenile diabetes &#40;7&#47;87&#59; 87&#37;&#41; and with HLA-B15&#44;<a class="elsevierStyleCrossRef" href="#bib0335"><span class="elsevierStyleSup">25</span></a> although these findings were not corroborated by other authors &#40;2&#47;65&#59; 3&#46;07&#37;&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a></p></span><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Gastrointestinal diseases</span><p id="par0140" class="elsevierStylePara elsevierViewall">A prevalence of celiac disease of 15&#37; &#40;9&#47;60&#41; has been reported in patients with GT&#44; which was statistically significant despite the lack of this significance in the quantification of antigens HLA-DQ2 and HLA-DQ8&#44; which are frequently found in this disease&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">26</span></a> Other authors have not related GT to a history of gastrointestinal disease&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a></p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Hematological disorders</span><p id="par0145" class="elsevierStylePara elsevierViewall">B&#225;n&#243;czy et al&#46; detected the presence of anemia in 17&#37; &#40;12&#47;70&#41; of patients with LG&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a> Cigic et al&#46; observed statistically significant iron-deficiency among patients with GT compared with a control group&#44; but the authors did not specify whether these patients had celiac disease&#46;<a class="elsevierStyleCrossRef" href="#bib0340"><span class="elsevierStyleSup">26</span></a></p></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Other diseases</span><p id="par0150" class="elsevierStylePara elsevierViewall">Although a significant relationship with systemic diseases is not always present&#44;<a class="elsevierStyleCrossRefs" href="#bib0315"><span class="elsevierStyleSup">21&#44;28</span></a> a number of authors have reported the absence of a relationship with certain diseases such as cardiovascular disease&#44;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> hepatic genitourinary disease&#44;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> thyroid diseases<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> and dyslipidemia&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> A relationship with systemic diseases has also not been observed in the pediatric population&#46;<a class="elsevierStyleCrossRef" href="#bib0355"><span class="elsevierStyleSup">29</span></a></p></span><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Association between geographic tongue and oral diseases</span><p id="par0155" class="elsevierStylePara elsevierViewall">The presence of <span class="elsevierStyleItalic">Helicobacter pylori</span> was reported in 1 of 37 patients with GT&#46;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">31</span></a> The statistically significant prevalence of candidiasis was reported in 14&#46;2&#37; of patients with GT &#40;10&#47;70&#41;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a> and in smaller series &#40;90&#37;&#59; 9&#47;10&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">32</span></a> In larger GT samples&#44; mycosis was diagnosed in 2&#46;12&#37; of patients &#40;5&#47;235&#41;<a class="elsevierStyleCrossRef" href="#bib0360"><span class="elsevierStyleSup">30</span></a>&#59; the mean involvement was therefore 7&#46;61&#37; &#40;24&#47;315&#41;&#46;</p><p id="par0160" class="elsevierStylePara elsevierViewall">Another reported infection was caries&#44; with a higher statistically significant index of decayed&#44; missing and filled teeth among patients with GT than in a control group of adults&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a> Variations in the quantity of saliva secretion were not recorded&#44;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">32</span></a> and their pH was qualitatively more acidic when compared with a healthy control group&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">32</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">GT was concomitant with fissured tongue in up to 49&#46;2&#37; of a sample<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">15</span></a> and has been reported in a statistically significant manner in other studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0295"><span class="elsevierStyleSup">17&#44;18&#44;32&#44;35</span></a> Although a high rate of the 2 diseases has been found in the pediatric population&#44;<a class="elsevierStyleCrossRef" href="#bib0355"><span class="elsevierStyleSup">29</span></a> a statistically significant association between GT and fissured tongue has not been observed in this age group&#46;<a class="elsevierStyleCrossRefs" href="#bib0350"><span class="elsevierStyleSup">28&#44;33</span></a> The association between GT and fissured tongue among siblings was manifested in 17&#46;7&#37; of patients &#40;14&#47;79&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0400"><span class="elsevierStyleSup">38</span></a> Rahamimoff and Muhsma<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">39</span></a> described the progression of GT toward fissured tongue in a number of patients in the third year of monitoring &#40;37&#46;5&#37;&#59; 140&#47;373&#41;&#46;</p><p id="par0170" class="elsevierStylePara elsevierViewall">GT has been diagnosed in association with serrated tongue &#40;20&#46;9&#37;&#59; 62&#47;296&#41;<a class="elsevierStyleCrossRef" href="#bib0285"><span class="elsevierStyleSup">15</span></a> and in a statistically significant manner among patients with burning mouth syndrome &#40;32&#46;9&#37;&#59; 53&#47;161&#41; when comparing them with patients with temporomandibular dysfunction&#46;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">34</span></a></p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Cytological and histological characteristics</span><p id="par0175" class="elsevierStylePara elsevierViewall">The cytological peculiarities of GT were described by Scariot et al&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a> who specified a Papanicolaou grade of 2&#44; i&#46;e&#46; a normal smear with inflammatory changes&#46; The authors distinguished the increase in nuclear size&#44; thereby increasing its relationship with respect to the cytoplasm&#46; The nuclei showed a perinuclear halo due to its thickening of binuclear appearance&#46; The cytological analysis performed on 96 patients to rule out candidiasis did not report the findings of this test&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">12</span></a></p><p id="par0180" class="elsevierStylePara elsevierViewall">Biopsy studies and sample staining with hematoxylin-eosin were performed for 37 patients&#46; Banoczy et al&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a> described 2 areas&#46; In the area corresponding to the red patches&#44; there was greater intracellular and extracellular edema of the epithelial acanthosis and an inflammatory infiltrate&#44; mainly of neutrophils&#46; This inflammatory infiltrate was also observed in the more superficial layers of the epithelium&#44; forming microabscesses &#40;Munro&#39;s abscesses&#41;&#46; The center of the atrophy corresponds histologically with epithelial exfoliation triggered by the microabscesses&#44; identifying with the absence of filiform papillae and the parakeratotic layer&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">10</span></a></p></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0135">Treatment</span><p id="par0185" class="elsevierStylePara elsevierViewall">The treatments come from 3 articles on 101 patients&#46; Banoczy et al&#46; proposed the alternative of vitamins A&#44; B&#44; C and B<span class="elsevierStyleInf">12</span>&#44; iron and sex hormone replenishment&#44; as well as antifungal regimens&#44; although these were effective in &#60;3&#37; of the treated patients&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a> Another 3 patients with pain &#40;out of 188&#41; were treated with topical antihistamines&#44; the results of which were not reported&#46;<a class="elsevierStyleCrossRef" href="#bib0300"><span class="elsevierStyleSup">18</span></a> The third article was a comparative clinical trial between the topical use of 0&#46;1&#37; triamcinolone acetonide alone and the combination with 0&#46;05&#37; retinoic acid&#44; twice daily&#44; for 10 days in symptomatic GT &#40;without specifying its quantification&#41;&#46; Of their results from 28 patients&#44; the authors noted that both treatments provided clinical improvement&#44; without showing significant differences in the use of the corticosteroid in isolation or combined with retinoid&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">41</span></a></p></span></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0140">Discussion</span><p id="par0190" class="elsevierStylePara elsevierViewall">The present systematic review covers 33 studies developed using 4 methodological designs&#58; cases and controls &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>19&#41;&#44; cross-sectional studies &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>11&#41;&#44; cohort &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>2&#41; and a randomized clinical trial&#46; A total of 4998 patients with GT were analyzed from the perspective of their clinical manifestations&#44; diagnosis and treatment&#46;</p><p id="par0195" class="elsevierStylePara elsevierViewall">The various authors included in this review followed the classical definition of GT proposed by Hume&#46;<a class="elsevierStyleCrossRef" href="#bib0235"><span class="elsevierStyleSup">5</span></a> Thus&#44; GT appears as irregular erythematous patches due to a loss of filiform papillae&#44; typically circumscribed by bands or white keratotic lines that are slightly raised&#44; preserving the fungiform papillae&#44; which have a self-limiting and migratory character&#46;</p><p id="par0200" class="elsevierStylePara elsevierViewall">GT is a disorder that has an interchangeable prevalence between the sexes&#44; whose ratio is approximately 1 to 1 &#40;50&#46;13&#37; and 49&#46;87&#37; for males and females&#44; respectively&#41;&#46; Tobacco use was considered in 7 studies&#44; reporting tobacco consumption by 17&#46;45&#37; of registered patients &#40;217&#47;1243&#41;&#46; The prevalence of alcohol consumption was more relevant&#44; however&#44; although the sample size for their preparation was smaller &#40;42&#46;2&#37;&#59; 187&#47;443&#41;&#46;</p><p id="par0205" class="elsevierStylePara elsevierViewall">The symptom criteria were difficult to interpret because the degree of pain &#40;measured with the VAS&#41; was only considered in 19 patients&#46;<a class="elsevierStyleCrossRef" href="#bib0310"><span class="elsevierStyleSup">20</span></a> Another symptom criterion was expressed through the presence or absence of a burning sensation&#44; a symptom that defines burning mouth syndrome in the absence of clinical and pathological signs&#46;<a class="elsevierStyleCrossRef" href="#bib0420"><span class="elsevierStyleSup">42</span></a> This symptom appeared in 9&#46;2&#37; to 47&#37; of patients with GT<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;15&#44;20</span></a> and in 32&#46;9&#37; of patients with burning mouth syndrome&#46;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">34</span></a></p><p id="par0210" class="elsevierStylePara elsevierViewall">The patients with GT did not report total dysgeusia in a statistically significant manner&#46;<a class="elsevierStyleCrossRef" href="#bib0410"><span class="elsevierStyleSup">40</span></a> This result could be due to the concept of GT&#44; because lingual atrophy mostly affects the filiform papillae &#40;papillae that are not involved in taste&#41; and preserves the fungiform papillae that contain the taste buds&#46;</p><p id="par0215" class="elsevierStylePara elsevierViewall">The extensive documentation that examined the association between GT and other ailments requires an understanding of its comorbidity with various systemic and local conditions of the oral cavity&#46; This understanding helps focus on whether this condition involves an oral disease with systemic repercussion or an oral manifestation of a systemic disease&#46; Thus&#44; the link between GT psoriasis&#44; between GT and certain allergies and between GT and certain psychological disorders can be considered bidirectional&#46; Patients with GT have been observed to have psoriasis &#40;at a mean rate of 12&#46;5&#37; of the sample<a class="elsevierStyleCrossRefs" href="#bib0255"><span class="elsevierStyleSup">9&#44;10&#44;13&#44;14</span></a>&#41;&#44; allergies &#40;12&#46;6&#37;<a class="elsevierStyleCrossRefs" href="#bib0285"><span class="elsevierStyleSup">15&#44;16&#44;18&#44;21&#44;28</span></a>&#41; and anxiety &#40;29&#46;5&#37;&#59; 13&#47;44<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a>&#41;&#46; GT manifested in 13&#46;5&#37; of patients with psoriasis&#44;<a class="elsevierStyleCrossRefs" href="#bib0270"><span class="elsevierStyleSup">12&#44;15&#44;18</span></a> in 31&#46;08&#37; &#40;9&#47;27&#41;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> of patients with allergies and in 7&#46;6&#37; &#40;5&#47;66&#41; of those with psychological disorders&#46;<a class="elsevierStyleCrossRef" href="#bib0295"><span class="elsevierStyleSup">17</span></a> Other diseases that can be present in GT include diabetes&#44; iron-deficiency anemia and celiac disease&#46;</p><p id="par0220" class="elsevierStylePara elsevierViewall">Two of the most prevalent oral infections reported in patients with GT are caries and oral candidiasis&#46; The statistically significant evidence of caries in patients with GT&#44; when compared with a healthy control group&#44; is explained by the qualitative findings of a more acidic saliva&#44; thereby promoting the cariogenic process despite the lack of hyposalivation &#40;quantitative reduction in saliva&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">32</span></a> Oral candidiasis was manifested in 7&#46;6&#37; &#40;24&#47;315&#41; of the patients with GT&#46; The differential diagnosis of these 2 diseases can be initially established through examination&#46; The keratotic lesions that define GT cannot be eliminated by scraping and normally self-resolve&#44; although they can reoccur within a variable period&#46;</p><p id="par0225" class="elsevierStylePara elsevierViewall">The previous description of GT&#44; along with the self-limiting behavior&#44; helps with the clinical diagnosis&#46; Only 1&#46;19&#37; of the analyzed sample was examined using complementary techniques of cytological diagnosis and biopsy&#46; In atypical forms&#44; a cytological study may be used to confirm the clinical diagnosis&#46; Despite only being used in 17 samples&#44; the cytological description can define the disease due to the inflammatory characteristics &#40;Papanicolaou type 2&#41;&#44; with the characteristic image of nuclear demarcation&#46;<a class="elsevierStyleCrossRef" href="#bib0315"><span class="elsevierStyleSup">21</span></a> In rare cases&#44; a biopsy that identifies the Munro abscesses may be performed&#46;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a></p><p id="par0230" class="elsevierStylePara elsevierViewall">Given the chronicity and fear of cancer generated in the patient by asymptomatic GT lesions&#44; the first step is to inform the patient of the nature and benign behavior of the lesion&#44;<a class="elsevierStyleCrossRef" href="#bib0345"><span class="elsevierStyleSup">27</span></a> reserving drug treatment for lesions that the patient reports as painful&#46; Furthermore&#44; the only relevant clinical trial that has confirmed a therapeutic response proposed the application of 0&#46;1&#37; triamcinolone acetonide in orabase &#40;combined or not with 0&#46;05&#37; retinoic acid&#41;&#44; twice daily&#44; for 10 days&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">41</span></a><a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a> shows the clinical management of the diagnosis and therapy resulting from the present review&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0235" class="elsevierStylePara elsevierViewall">There are a number of limitations in this review&#46; The number of studies was small&#44; which was mainly due to the lack of a GT definition in the methodology&#44; which prompted us to exclude 38 articles&#46; No less important was the heterogeneity in the studies&#8217; design and objectives&#44; which is why their comparative analysis was not performed&#46; In most of the research studies&#44; the focus was on the comorbidity with specific diseases&#44; lacking documentation related to the symptoms and therapy&#46;</p><p id="par0240" class="elsevierStylePara elsevierViewall">Future studies should aim at completing the therapeutic understanding of GT&#44; as well as the implication of the presence of GT as a marker of severity for the comorbid diseases proposed in the present study&#44; such as psoriasis&#44; various allergies and anxiety&#46;</p></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0145">Conflicts of interest</span><p id="par0245" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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              "titulo" => "Introducci&#243;n"
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          "titulo" => "Background"
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          "titulo" => "Materials and methods"
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            0 => array:2 [
              "identificador" => "sec0020"
              "titulo" => "Demographic characteristics and toxic habits"
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              "identificador" => "sec0025"
              "titulo" => "Patient characteristics"
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            2 => array:2 [
              "identificador" => "sec0030"
              "titulo" => "Psoriasis"
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            3 => array:2 [
              "identificador" => "sec0035"
              "titulo" => "Allergies&#47;atopy&#47;asthma"
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              "titulo" => "Psychological&#47;psychiatric factors"
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              "identificador" => "sec0045"
              "titulo" => "Diabetes"
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              "identificador" => "sec0050"
              "titulo" => "Gastrointestinal diseases"
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              "titulo" => "Hematological disorders"
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              "titulo" => "Other diseases"
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              "identificador" => "sec0065"
              "titulo" => "Association between geographic tongue and oral diseases"
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              "titulo" => "Cytological and histological characteristics"
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    "fechaRecibido" => "2018-03-12"
    "fechaAceptado" => "2018-05-12"
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          "palabras" => array:6 [
            0 => "Benign migratory glossitis"
            1 => "Geographic tongue"
            2 => "Comorbidity"
            3 => "Caries"
            4 => "Treatment"
            5 => "Systematic review"
          ]
        ]
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          "titulo" => "Palabras clave"
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          "palabras" => array:6 [
            0 => "Glositis migratoria benigna"
            1 => "Lengua geogr&#225;fica"
            2 => "Comorbilidad"
            3 => "Caries"
            4 => "Tratamiento"
            5 => "Revisi&#243;n sistem&#225;tica"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Geographic tongue &#40;GT&#41; is a lesion of unknown origin associated with systemic diseases and therefore involves multidisciplinary care&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">We performed a literature search of the PubMed&#44; EMBASE&#44; Web of Science and Cochrane databases&#46; The selection criteria were consistent with the Preferred Reporting Items for Systematic Reviews protocol&#46; We considered as inclusion criteria journal articles designed on cases of cohorts&#44; cross-sectional studies&#44; cases and controls and randomized clinical trials in the pathogenic&#44; clinical and therapeutic context&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">A total of 33 articles met these criteria&#46; We analyzed 4998 patients with GT&#44; with an age range of 0&#8211;85 years&#44; and the burning sensation symptom was present in 9&#46;2&#8211;47&#37; of these patients&#46; The GT diagnosis was clinical in 98&#46;81&#37; of the cases&#44; and GT displayed an association with psoriasis&#44; allergies and anxiety&#46; <span class="elsevierStyleItalic">Candida</span> infection was present in 7&#46;6&#37; &#40;24&#47;315&#41; of the cases&#44; and the presence of caries was statistically significant&#46; The only analyzed clinical trial proposed treatment through the topical application of 0&#46;1&#37; triamcinolone acetonide combined or not with 0&#46;05&#37; retinoic acid&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">The diagnosis of GT is mainly clinical&#46; GT is an asymptomatic disorder that usually requires no treatment&#46; Understanding GT is necessary due to the comorbid intraoral and extraoral diseases that accompany the condition&#46;</p></span>"
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        "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Introducci&#243;n</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">La lengua geogr&#225;fica &#40;LG&#41; es una lesi&#243;n de origen desconocido asociada a enfermedades sist&#233;micas&#44; por lo que su atenci&#243;n plantea una validez multidisciplinar&#46;</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">M&#233;todos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">La b&#250;squeda de los art&#237;culos fue realizada a partir de las bases de datos de PubMed&#44; Embase&#44; Web of Science y Cochrane Database&#46; Los criterios de selecci&#243;n fueron en concordancia con el protocolo <span class="elsevierStyleItalic">Preferred Reporting Items for Systematic Reviews</span>&#46; Hemos considerado como criterios de inclusi&#243;n los art&#237;culos en revistas dise&#241;ados sobre casos de cohortes&#44; estudios transversales&#44; casos y controles&#44; y ensayos cl&#237;nicos aleatorizados en el contexto patog&#233;nico&#44; cl&#237;nico y terap&#233;utico&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Un total de 33 art&#237;culos cumplieron dichos criterios&#46; El n&#250;mero de pacientes analizados con LG fue de 4&#46;998 con un rango de edad entre los 0 y 85 a&#241;os&#46; La sintomatolog&#237;a de sensaci&#243;n de ardor estuvo presente en entre el 9&#44;2&#37; y el 47&#37; de los pacientes&#46; El diagn&#243;stico de la LG fue cl&#237;nico en el 98&#44;81&#37;&#46; Se ha manifestado en la LG una asociaci&#243;n con la psoriasis&#44; las alergias y la ansiedad&#46; La infecci&#243;n por <span class="elsevierStyleItalic">Candida</span> se present&#243; en el 7&#44;6&#37; &#40;24&#47;315&#41; y la presencia de caries fue estad&#237;sticamente significativa&#46; El &#250;nico ensayo cl&#237;nico analizado propone como tratamiento el uso t&#243;pico de acet&#243;nido de triamcinolona al 0&#44;1&#37;&#44; combinado o no con el &#225;cido retinoico al 0&#44;05&#37;&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusiones</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">El diagn&#243;stico de la lengua geogr&#225;fica es principalmente cl&#237;nico&#46; Es un desorden asintom&#225;tico que habitualmente no requiere tratamiento&#46; El conocimiento de la LG es necesario debido a las enfermedades com&#243;rbidas intra y extraorales que la acompa&#241;an&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Gonz&#225;lez-&#193;lvarez L&#44; Garc&#237;a-Pola MJ&#44; Garc&#237;a-Mart&#237;n JM&#46; Lengua geogr&#225;fica&#58; factores predisponentes&#44; diagn&#243;stico y tratamiento&#46; Revisi&#243;n sistem&#225;tica&#46; Rev Cl&#237;n Espa&#241;ol&#46; 2018&#59;218&#58;481&#8211;488&#46;</p>"
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                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Patients with GT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">4998&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Visual analog scale &#40;VAS&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">VAS<span class="elsevierStyleHsp" style=""></span>&#60;30 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>10&#41;&#59; VAS 30&#8211;60 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#41;&#59; VAS<span class="elsevierStyleHsp" style=""></span>&#8805;<span class="elsevierStyleHsp" style=""></span>60 &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Severity according to the no&#46; of lesions&nbsp;\t\t\t\t\t\t\n
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        0 => array:2 [
          "identificador" => "bibs0015"
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                            0 => "S&#46;C&#46; Costa"
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