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&#40;1&#41; unicentric CD &#40;UCD&#41;&#59; &#40;2&#41; multicenter CD &#40;MCD&#41; associated with infection by the human herpes virus 8 &#40;HHV-8&#41; and by the human immunodeficiency virus &#40;HIV&#41; &#40;MCD-HHV-8&#43;&#47;HIV&#43;&#41;&#59; &#40;3&#41; MCD with infection by HHV-8 but not by HIV &#40;MCD-HHV-8&#43;&#47;HIV-&#41;&#59; and &#40;4&#41; MCD not associated with any of these viruses&#44; which has recently been called idiopathic MCD &#40;iMCD&#41;&#46; CD as a whole is considered a rare or minority disease&#46; Despite the considerable interest the disease has generated since its initial description and the significant developments in research &#40;more than 2700 entries in PubMed in September 2015&#41;&#44; there is still no consensus on its treatment&#46; Therefore&#44; one of the objectives of this review is to facilitate an understanding of the current therapeutic options&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Epidemiology</span><p id="par0010" class="elsevierStylePara elsevierViewall">The incidence of CD is unknown&#46; Based on patient cohort results extracted from databases&#44; a number of authors have estimated an incidence of approximately 21 cases per million inhabitants in the United States&#46;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">2</span></a> The disease usually affects middle-aged people&#44; although with a bimodal distribution with a peak in young patients &#40;30&#8211;40 years&#41; and another at approximately 60 years&#46; The incidence is similar in both sexes&#46; The incidence of MCD-HHV-8&#43;&#47;HIV&#43; has increased in recent years due to the AIDS epidemic&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Classification</span><p id="par0015" class="elsevierStylePara elsevierViewall">CD is classically divided into 2 types based on the onset of isolated adenomegaly &#40;UCD&#41; or polyadenopathies &#40;MCD&#41;&#46; These 2 conditions have very different clinical and histological characteristics&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">CD causes an architectural change in the structure of the lymph nodes&#44; which affects all their compartments&#46; Histologically&#44; CD is classified into a hyaline-vascular &#40;HV&#41; form and a plasmocellular &#40;PC&#41; form&#44; although mixed variants can occasionally be observed&#44; especially in the MCD forms&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">3</span></a> In the HV form&#44; the follicles show atrophic germinal centers&#44; invaded by dendritic follicular cells and hyalinized vessels&#44; which form bridges and connections between them&#46; These centers are surrounded by mantle lymphocytes arranged in concentric rings that mimic the typical &#8220;onion layer&#8221; presentation&#46; Two subtypes have been reported in the HV form&#58; the classical lymphoid subtype and the stroma-cell rich subtype&#46; The latter subtype has been reported as a possible precursor of follicular dendritic cell sarcomas&#46;<a class="elsevierStyleCrossRef" href="#bib0375"><span class="elsevierStyleSup">4</span></a> In the PC variant&#44; the follicles show hyperplastic germinal centers&#44; and the interfollicular regions characteristically contain polyclonal plasma cells&#59; the characteristic vascular proliferation of the HV forms is not observed&#46; A third histological variant&#44; known as plasmablastic&#44; has recently been reported&#44;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">5</span></a> which occurs in particularly aggressive cases of MCD associated with HHV-8<a class="elsevierStyleCrossRef" href="#bib0385"><span class="elsevierStyleSup">6</span></a> and in the forms associated with POEMS syndrome<a class="elsevierStyleCrossRef" href="#bib0390"><span class="elsevierStyleSup">7</span></a> &#40;Crow-Fukase syndrome<a class="elsevierStyleCrossRef" href="#bib0395"><span class="elsevierStyleSup">8</span></a>&#41;&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">This morphological complexity carries over to clinical practice&#44; because there are patients who show an overlap between UCD and MCD&#46; In the early years&#44; there was certain controversy in the literature when describing the cases&#46; The limitations in disease staging and the limited experience with the histological analysis of samples fostered confusion among the clinical and histological variants&#46; Despite the improvements in diagnostic techniques and the experience acquired with CD&#44; there are still a number of issues concerning its classification&#46; Isolated unicentric masses&#44; which used to be identified with plain radiographs&#44; can now be accompanied by adenopathies in other regions or by reactive splenomegaly&#46; In a small number of cases&#44; the use of techniques such as computed tomography&#44; magnetic resonance and positron emission tomography blurs the unequivocal separation between UCD and MCD&#46; Despite these difficulties&#44; however&#44; the majority of patients can be classified into one of the 2 variants &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Pathophysiology</span><p id="par0030" class="elsevierStylePara elsevierViewall">There have been major advances in understanding the pathophysiology of CD&#46; There are various theories based on the repeated antigenic stimulus of nodal B lymphocytes in response to some etiological agent&#46; The most accepted model is the one derived from an abnormal overproduction of interleukin-6 &#40;IL-6&#41; by B lymphocytes of the mantle zone&#46; These cells are stimulated on most occasions by a viral antigen &#40;HHV-8&#41; and&#44; less frequently&#44; by endogenous or exogenous factors of still unknown origin&#46;<a class="elsevierStyleCrossRef" href="#bib0400"><span class="elsevierStyleSup">9</span></a> The inflammatory mediators and co-infection by HHV-8 and HIV are important factors for explaining the symptoms and etiopathogenesis of CD&#46; Below&#44; we show the role of each of the compounds that are involved in the pathogenesis of the disease&#46;</p><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Interleukin-6&#44; interleukin-6 receptor and vascular endothelial growth factor</span><p id="par0035" class="elsevierStylePara elsevierViewall">IL-6 behaves as an inducer of B-cell proliferation&#46; IL-6 is involved in the hepatic synthesis of acute-phase reactants and is responsible for the general symptoms&#44; which are characteristic of numerous systemic inflammatory diseases&#46;<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">10</span></a> IL-6 is also involved in hepcidin synthesis&#44; which regulates serum iron levels and is the main cause of anemia in chronic diseases&#46;<a class="elsevierStyleCrossRef" href="#bib0410"><span class="elsevierStyleSup">11</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">Serum IL-6 concentrations are strikingly high in CD&#46; IL-6 levels are even higher than in other diseases such as rheumatoid arthritis and multiple myeloma&#44; where its pathogenic role is well-known&#46;<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">10</span></a> Excess IL-6 induces a proinflammatory syndrome that explains the general symptoms typical of MCD and increased levels of acute phase reactants&#46; High concentrations have also been reported in peripheral blood in cases of UCD that&#44; after the single mass has been removed&#44; experience a reduction&#44; with symptom remission&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">12</span></a> Differences in clinical expression in various populations have been identified&#46; For example&#44; very prominent skin manifestations have been reported in Asians&#44; as well as pemphigus&#44; renal damage and an increased frequency of interstitial pulmonary involvement&#46;<a class="elsevierStyleCrossRef" href="#bib0420"><span class="elsevierStyleSup">13</span></a> Furthermore&#44; differences have been reported in particular polymorphisms that affect IL-6R and that are associated with higher plasma IL-6R concentrations in patients with iMCD&#46;<a class="elsevierStyleCrossRef" href="#bib0425"><span class="elsevierStyleSup">14</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">One of the functions of IL-6 is to induce vascular endothelial growth factor &#40;VEGF&#41; expression&#46;<a class="elsevierStyleCrossRef" href="#bib0430"><span class="elsevierStyleSup">15</span></a> It is believed that this compound causes hypervascularization of the germinal regions of the lymph nodes in CD&#46; Several researchers have found high serum VEGF levels in patients with CD&#44; as well as its overexpression in plasma cells and interfollicular regions&#46;<a class="elsevierStyleCrossRef" href="#bib0435"><span class="elsevierStyleSup">16</span></a> Although the involvement of VEGF in the pathogenesis of CD is indisputable&#44; its mechanism of action is still unclear&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">These findings&#44; along with the usefulness of blocking this inflammatory pathway as a possible therapy&#44;<a class="elsevierStyleCrossRef" href="#bib0440"><span class="elsevierStyleSup">17</span></a> have established the fundamental role of IL-6 in the development of MCD and the perpetuation of its symptoms&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Human herpesvirus 8</span><p id="par0055" class="elsevierStylePara elsevierViewall">With the HIV epidemic in the 1980s&#44; there was a reported increase in the incidence of Kaposi&#39;s sarcoma &#40;KS&#41;&#44; a previously uncommon skin cancer&#46; In 1994&#44; a new gamma virus belonging to the herpes virus family was sequenced in the biopsies of patients with KS&#58; HHV-8&#46;<a class="elsevierStyleCrossRef" href="#bib0445"><span class="elsevierStyleSup">18</span></a> In addition to KS&#44; there are other diseases that are closely associated with this virus&#44; such as body cavity lymphoma and MCD&#46; The mechanism of action of HHV-8 consists of the secretion of viral particles homologs of human IL-6 &#40;vIL-6&#41; by B cells of the infected mantle&#46; These particles hyperstimulate the production of B cells and the secretion of human IL-6&#44; perpetuating the inflammatory cycle&#46;<a class="elsevierStyleCrossRef" href="#bib0450"><span class="elsevierStyleSup">19</span></a> This pathogenic mechanism has been confirmed due to the finding of a close correlation between disease activity and viral load&#46;<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">20</span></a> It has been postulated that HHV-8 is a necessary but insufficient agent for causing the disease&#46; HHV-8 has been reported in up to 40&#37; of HIV- patients with MCD and in up to 100&#37; of a series of patients with MCD and positive HIV serology&#46;<a class="elsevierStyleCrossRef" href="#bib0460"><span class="elsevierStyleSup">21</span></a> This situation contrasts with the pathogenic mechanism of MCD and HHV-8&#44; given that its initial stimulation is polyclonal&#46; HHV-8 tends to perpetuate preferentially in plasmoblasts that express IgM&#955; light chains but not in those that express other types of Ig or k light-chain&#46; Despite this monotypic expression&#44; infected B cells do not show rearrangements of the heavy chains &#40;IgH&#41; and maintain their polyclonal character&#46;<a class="elsevierStyleCrossRef" href="#bib0465"><span class="elsevierStyleSup">22</span></a> The high-power replication of HHV-8 in monotypic B cells can over time cause IgH rearrangements&#44; which lead to microlymphomas and even developed plasmablastic lymphomas&#46;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">5</span></a></p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Human immunodeficiency virus</span><p id="par0060" class="elsevierStylePara elsevierViewall">MCD is considered a disease related to the complex of AIDS-associated lymphadenopathies&#44; although its incidence is low within that spectrum &#40;2&#37;&#41;&#46; A fundamental role in MCD has been attributed to HIV&#44; given its high replicative capacity and persistent stimulation of B lymphocytes&#46;<a class="elsevierStyleCrossRef" href="#bib0470"><span class="elsevierStyleSup">23</span></a> However&#44; it is currently believed that immunosuppression and co-infection with HHV-8 are the main pathogenic factors of MCD&#46;</p></span></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Unicentric Castleman&#39;s disease</span><p id="par0065" class="elsevierStylePara elsevierViewall">The paradigm of UCD corresponds to Castleman&#39;s original description in 1956&#46;<a class="elsevierStyleCrossRef" href="#bib0360"><span class="elsevierStyleSup">1</span></a> Approximately 90&#37; of cases correspond to the histological variant HV&#46; Unlike the multicentric form&#44; little is known about the etiopathogenesis of UCD&#46; Excess IL-6 secretion has been found only in isolated cases with general symptoms&#46; An association with either HHV-8 or HIV infection has not been reported&#46; Although it can occur at any age&#44; UCD tends to appear at younger ages and has a certain characteristic predilection for the female sex&#46;<a class="elsevierStyleCrossRef" href="#bib0475"><span class="elsevierStyleSup">24</span></a></p><p id="par0070" class="elsevierStylePara elsevierViewall">UCD is usually asymptomatic in most cases&#46; The main characteristics of UCD are listed in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46; The most common symptoms are isolated swelling of a lymph node station&#46; Symptoms can appear resulting from the local compression of neighboring anatomical structures&#46; If systemic manifestations occur&#44; they usually correspond to a PC histological pattern&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">Diverse local disorders have been reported&#44; including mediastinal&#44; cervical&#44; abdominal and retroperitoneal disorders&#46; Mediastinal masses can grow to a considerable size and present signs of hypervascularization&#44; developing abnormal feeding vessels from the bronchial arteries &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1A and B</a>&#41;&#46; Paraneoplastic pemphigus <a class="elsevierStyleCrossRef" href="#bib0480"><span class="elsevierStyleSup">25</span></a> and bronchiolitis obliterans<a class="elsevierStyleCrossRef" href="#bib0485"><span class="elsevierStyleSup">26</span></a> have characteristically been reported as associated systemic manifestations&#46; In these cases&#44; the prognosis is poor due to the complications resulting from progressive respiratory failure and infections&#44; which in many cases lead to death&#46;<a class="elsevierStyleCrossRef" href="#bib0490"><span class="elsevierStyleSup">27</span></a></p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0080" class="elsevierStylePara elsevierViewall">Typically&#44; there are no specific abnormal laboratory test results&#46; Some patients can experience anemia with an iron deficiency profile&#44; chronic or mixed disorders&#44; hypoalbuminemia&#44; hypergammaglobulinemia&#44; increased erythrocyte sedimentation rates and higher C-reactive protein &#40;CRP&#41; levels&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Multicentric Castleman&#39;s disease</span><p id="par0085" class="elsevierStylePara elsevierViewall">MCD has a very different profile from that of the unicentric variant&#46; MCD can be more or less severe depending on whether it is associated with clonal conditions such as the syndrome characterized by polyneuropathy&#44; organomegaly&#44; endocrinopathy&#44; monoclonal gammopathy and skin changes &#40;POEMS syndrome&#41; and HIV or HHV-8 infection&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall">Prior to the AIDS epidemic&#44; MCD presented in patients in the sixth decade of life&#46; However&#44; MCD associated with HIV usually affects younger populations&#46;<a class="elsevierStyleCrossRefs" href="#bib0495"><span class="elsevierStyleSup">28&#44;29</span></a> The evolution of MCD has been changed by the behavior of HIV infection in the last 2 decades&#46; At the start of the 1990s&#44; there was an increase in the incidence of MCD&#44; which decreased by the end of the 2000s&#44; thanks to the implementation of antiretroviral treatment&#46;<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">30</span></a> However&#44; there are subtypes of MCD depending on whether it is associated with HIV&#44; HHV-8 or both&#46; In HIV&#47;HHV-8&#43; patients&#44; the disease assumes a more aggressive and abrupt course&#46; Given the frequent coexistence of HIV infection&#44; KS and MCD&#44; it was believed that HHV-8 was essential for developing the disease&#46; In recent years&#44; however&#44; a number of cases of MCD associated with HIV with negative tests for HHV-8 have been published&#46;<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">31</span></a> Moreover&#44; there is a patient group with MCD that is not infected by HIV or HHV-8&#46; In these cases&#44; the etiology is unknown&#44; although numerous theories have been proposed&#44; including infectious causes by still unidentified agents&#44; underlying autoimmune diseases&#44; genetic mutations in the germinal line that affect the innate immunity and even malignancies&#44; as promoters of this type of idiopathic MCD&#46;<a class="elsevierStyleCrossRef" href="#bib0515"><span class="elsevierStyleSup">32</span></a> Current research efforts are focused on ascertaining the etiology in this subtype&#46;</p><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Clinical presentation</span><p id="par0095" class="elsevierStylePara elsevierViewall">The clinical expression varies and depends on the extent of the disease&#44; the blood cytokine concentration and positive&#47;negative state of HIV and HHV-8 virus infection&#46; Most patients have prominent general symptoms &#40;fever&#44; hyporexia&#44; night-time sweats&#44; asthenia&#41;&#44; along with those resulting from lymph node and visceral involvement&#46;<a class="elsevierStyleCrossRef" href="#bib0520"><span class="elsevierStyleSup">33</span></a> Patients with POEMS symptomatology present the clinical characteristics of that syndrome &#40;skin changes and neurological and endocrine disorders&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0525"><span class="elsevierStyleSup">34</span></a> sometimes accompanied by osteosclerotic bone involvement&#46;<a class="elsevierStyleCrossRef" href="#bib0530"><span class="elsevierStyleSup">35</span></a><a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a> shows a case of idiopathic MCD&#44; with a monoclonal peak and multiple osteosclerotic lesions&#44; with osteoblastic activity in the scintigraphy&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0100" class="elsevierStylePara elsevierViewall">From the neurological point of view&#44; MCD can present as peripheral motor polyneuropathy in the context of POEMS or can affect the optic nerve in the form of papilledema&#46;<a class="elsevierStyleCrossRef" href="#bib0535"><span class="elsevierStyleSup">36</span></a> There have been reports of other findings resulting from hypoalbuminemia in the context of TAFRO syndrome &#40;a Japanese variant of MCD known as Castleman-Kojima disease&#44; which combines thrombocytopenia&#44; anasarca&#44; reticulin fibrosis&#44; renal dysfunction and organomegaly&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0540"><span class="elsevierStyleSup">37</span></a> interstitial pulmonary involvement and even respiratory distress &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0545"><span class="elsevierStyleSup">38</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">In iMCD&#44; the clinical spectrum is broader than in the forms associated with HHV-8 and HIV&#46; Symptom severity varies from flu-like conditions and generalized lymphadenopathy with intense constitutional symptoms to the development of multiple organ failure in the context of a macrophage-activation syndrome&#46;<a class="elsevierStyleCrossRef" href="#bib0550"><span class="elsevierStyleSup">39</span></a> The disease course can be relapsing without treatment&#44; gradually progressive or include severe exacerbations that lead to death&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">Occasionally&#44; diseases need to be ruled out that can cause Castleman-like histological findings in the lymph nodes&#44; such as systemic lupus erythematosus&#44; Epstein&#8211;Barr virus infection&#44; syphilis&#44; a number of lymphomas and IgG4-related lymphadenopathy&#46; Nevertheless&#44; associations between MCD and the abovementioned conditions have been reported&#44; which illustrates the diagnostic complexity&#46;</p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Abnormal laboratory test results</span><p id="par0115" class="elsevierStylePara elsevierViewall">Abnormal laboratory test results are common&#46; Anemia of chronic disease is usually the most common&#46; Hemolytic anemia&#44; isolated or accompanied by thrombopenia&#44; in the context of Evans syndrome can also be observed&#46;<a class="elsevierStyleCrossRef" href="#bib0555"><span class="elsevierStyleSup">40</span></a> A multitude of immune-mediated pathogenic disorders have been documented &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#44; as well as positivity for various autoantibodies&#44; rheumatoid factor and cryoglobulins&#46;<a class="elsevierStyleCrossRef" href="#bib0560"><span class="elsevierStyleSup">41</span></a> For cases in which an association with POEMS is suspected&#44; the detection of monoclonal paraprotein through immunoelectrophoresis of blood and urine can be useful&#46;</p></span></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Treatment</span><p id="par0120" class="elsevierStylePara elsevierViewall">UCD&#44; MCD-HHV-8 &#40;with or without HIV coinfection&#41; and iMCD have different treatments&#46; It is advisable to provide multidisciplinary care in reference centers that have a medical expert coordinator &#40;hematologist or internist&#41; and several medical and surgical specialties involved in the process&#46; HIV units and the participation of a pathologist with experience in diagnosis are also instrumental&#46;</p><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Unicentric Castleman&#39;s disease</span><p id="par0125" class="elsevierStylePara elsevierViewall">Complete surgical exeresis of the adenopathic cluster is the treatment of choice&#46; Between 95&#37; and 100&#37; of cases remain cured in the long term&#46;<a class="elsevierStyleCrossRef" href="#bib0475"><span class="elsevierStyleSup">24</span></a> When the surgical approach due to the location or close relationship with vital structures is complex&#44; neoadjuvant treatment with steroids and rituximab can reduce the volume and margins of the cluster&#44; facilitating complete exeresis&#46;<a class="elsevierStyleCrossRef" href="#bib0565"><span class="elsevierStyleSup">42</span></a> In some cases&#44; full remission has been reported with rituximab&#44; without needing subsequent surgery&#46;<a class="elsevierStyleCrossRef" href="#bib0570"><span class="elsevierStyleSup">43</span></a> Presurgical artery embolization techniques for large masses are acceptable in some cases&#46;<a class="elsevierStyleCrossRef" href="#bib0575"><span class="elsevierStyleSup">44</span></a> Radiation therapy has been relegated to special conditions&#44; despite the good remission rates obtained in historical series&#46;<a class="elsevierStyleCrossRef" href="#bib0580"><span class="elsevierStyleSup">45</span></a></p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Multicentric Castleman&#39;s disease</span><p id="par0130" class="elsevierStylePara elsevierViewall">There is no unanimous consensus on the optimal treatment for the variants of MCD&#46; The low prevalence and variable course &#40;occasionally relapsing or rapidly progressive&#41; makes it difficult to obtain a uniform collection of patients to conduct randomized prospective studies&#46; There has been only one randomized&#44; double-blind trial to test the efficacy of siltuximab versus placebo &#40;a study that included 79 patients&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0585"><span class="elsevierStyleSup">46</span></a></p><p id="par0135" class="elsevierStylePara elsevierViewall">A summary of the evidence from various therapies is provided below&#46; The recommendations for each form of MCD are listed&#44; showing a simple scheme that takes into account the etiologic agents involved and the severity of the clinical condition &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#41;&#46;</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Chemotherapy</span><p id="par0140" class="elsevierStylePara elsevierViewall">Monotherapy with vinblastine&#44; etoposide or doxorubicin has achieved symptom control and a partial unsustained response&#46;<a class="elsevierStyleCrossRef" href="#bib0590"><span class="elsevierStyleSup">47</span></a> CHOP &#40;cyclophosphamide&#44; doxorubicin&#44; vincristine&#44; prednisone&#41; or CVAD &#40;cyclophosphamide&#44; vincristine&#44; doxorubicin and dexamethasone&#41; combination chemotherapy is preferable to monotherapy because the former has achieved higher response rates and longer responses in 50&#37; of cases in studies with 4-year follow-ups&#46;<a class="elsevierStyleCrossRef" href="#bib0520"><span class="elsevierStyleSup">33</span></a> Polychemotherapy should be considered in clinical forms with multiple-organ damage&#46;<a class="elsevierStyleCrossRef" href="#bib0595"><span class="elsevierStyleSup">48</span></a></p></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Glucocorticoids</span><p id="par0145" class="elsevierStylePara elsevierViewall">Glucocorticoids have frequently been used in MCD&#46; The response rate is usually high &#40;60&#8211;70&#37;&#41; but the response is generally not sustained&#44; and the treatment should not be considered long-term&#46; In patients with MCD-HHV-8&#43;&#47;HIV&#43;&#44; Glucocorticoids increase mortality due to infections and the development of KS&#46;<a class="elsevierStyleCrossRef" href="#bib0600"><span class="elsevierStyleSup">49</span></a> At present&#44; the primary indication for glucocorticoids is limited to the initial control of symptoms&#44; using them for short periods or as part of combined chemotherapy regimens&#44; such as CHOP and CVAD with or without rituximab&#46;</p></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Rituximab</span><p id="par0150" class="elsevierStylePara elsevierViewall">Rituximab&#44; alone or combined with chemotherapy&#44; has significant activity in all variants of ECM&#44;<a class="elsevierStyleCrossRefs" href="#bib0595"><span class="elsevierStyleSup">48&#44;50&#8211;52</span></a> even when used as rescue therapy&#46;<a class="elsevierStyleCrossRefs" href="#bib0620"><span class="elsevierStyleSup">53&#44;54</span></a> A percentage of patients with HIV infection can experience exacerbation of preexisting KS lesions following treatment with rituximab&#46;<a class="elsevierStyleCrossRef" href="#bib0630"><span class="elsevierStyleSup">55</span></a> Caution is advised for these patients&#44; especially in conditions of severe immunosuppression &#40;detectable viral load&#44; low CD4 or active prior KS&#41;&#46; Immune-mediated phenomena can also occur after therapy with rituximab&#46;<a class="elsevierStyleCrossRef" href="#bib0635"><span class="elsevierStyleSup">56</span></a> A prospective study with 24 patients with HIV&#43; MCD assessed rituximab as an adjuvant agent to chemotherapy to maintain remission&#46;<a class="elsevierStyleCrossRef" href="#bib0640"><span class="elsevierStyleSup">57</span></a> With the strategy of one weekly dose of rituximab &#40;375<span class="elsevierStyleHsp" style=""></span>mg&#47;m<span class="elsevierStyleSup">2</span>&#41; for 4 weeks&#44; a response rate of 92&#37; was observed&#44; with full remission in 71&#37; at 13 months&#46; In a study of 49 patients with HIV&#43; MCD&#44; 35 patients were treated with rituximab and 14 with rituximab and etoposide &#40;a group considered at greater risk&#41;&#46; Progression-free survival at 2 and 5 years for all treated patients was 85&#37; and 61&#37;&#44; respectively&#46; The 8 cases among both groups with histologically confirmed relapse responded to retreatment with rituximab&#46;<a class="elsevierStyleCrossRef" href="#bib0605"><span class="elsevierStyleSup">50</span></a> The use of rituximab&#44; however&#44; decreased the transformation to lymphoproliferative neoplasia in a cohort of patients with MCD-HHV-8&#43;&#47;HIV&#43;&#46;<a class="elsevierStyleCrossRef" href="#bib0615"><span class="elsevierStyleSup">52</span></a></p></span><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Anti-interleukin-6</span><p id="par0155" class="elsevierStylePara elsevierViewall">The use of monoclonal antibodies directed against IL-6 &#40;siltuximab&#41; or its receptor &#40;tocilizumab&#41; has shown clinical efficacy in iMCD&#46;<a class="elsevierStyleCrossRefs" href="#bib0645"><span class="elsevierStyleSup">58&#8211;60</span></a> Tocilizumab has been approved for MCD in Japan since 2005&#44; while siltuximab has been approved in the United States and Europe for treating iMCD since 2014&#46; In Spain&#44; the Ministry of Health is currently establishing the price&#44; an indispensable condition for marketing the drug&#46;</p><p id="par0160" class="elsevierStylePara elsevierViewall">In a phase II&#44; randomized&#44; double-blind multicenter study of siltuximab &#40;11<span class="elsevierStyleHsp" style=""></span>mg&#47;kg intravenously infused every 3 weeks&#41; vs&#46; placebo in 79 patients with moderately symptomatic iMCD&#44; the overall response rate was higher in the treated group &#40;34&#37; vs&#46; 0&#37;&#41;&#44; with improvement in the anemia&#44; inflammation markers &#40;CRP&#44; erythrocyte sedimentation rate and fibrinogen&#41; and the baseline clinical state&#46; This study continues in a single open arm for the patients who responded&#44; with the objective of understanding long-term safety and efficacy&#46;<a class="elsevierStyleCrossRef" href="#bib0585"><span class="elsevierStyleSup">46</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">The safety and efficacy of tocilizumab was assessed in a prospective&#44; open multicenter trial that included 28 symptomatic patients with the PC variant of MCD<a class="elsevierStyleCrossRef" href="#bib0660"><span class="elsevierStyleSup">61</span></a> and with no HIV and 2 patients with HHV-8&#43;&#46; The patients were initially treated with an intravenous dosage of 8<span class="elsevierStyleHsp" style=""></span>mg&#47;kg every 2 weeks for 16 weeks&#44; with a subsequent extension phase that allowed for a varying dosage&#46; After 16 weeks of treatment&#44; improvement was observed in the clinical and laboratory parameters&#44; with a reduction in the daily dose of glucocorticoids and without needing treatment with blood products&#46;</p><p id="par0170" class="elsevierStylePara elsevierViewall">In short&#44; therapy directed against IL-6 is a viable option and an important advance in iMCD&#46; Nevertheless&#44; long-term follow-up is needed to establish the optimal treatment duration and to determine whether the initial response rates translate into greater survival&#46;</p></span><span id="sec0095" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Antivirals</span><p id="par0175" class="elsevierStylePara elsevierViewall">The clinical manifestations of MCD are correlated with the viral load of serum HHV-8&#44; which indicates that they could be directly related to the replication of the virus&#46;<a class="elsevierStyleCrossRef" href="#bib0665"><span class="elsevierStyleSup">62</span></a> In a pilot study&#44; 14 patients with MCD-HHV-8&#43;&#47;HIV&#43; were treated with high-dose zidovudine &#40;600<span class="elsevierStyleHsp" style=""></span>mg orally every 6<span class="elsevierStyleHsp" style=""></span>h&#41; and valganciclovir &#40;900<span class="elsevierStyleHsp" style=""></span>mg orally every 12<span class="elsevierStyleHsp" style=""></span>h&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">63</span></a> After a median follow-up of 43 months&#44; overall survival at 12 months was 86&#37;&#46; Although there are no comparative studies on the addition of antivirals&#44; experts recommend combining ganciclovir or valganciclovir with rituximab for patients with MCD-HHV-8&#43;&#47;HIV&#43;&#46;<a class="elsevierStyleCrossRef" href="#bib0610"><span class="elsevierStyleSup">51</span></a> The more symptomatic patients&#44; those with preexisting KS or a greater degree of immunosuppression&#44; are considered at high risk and should therefore undergo chemotherapy with etoposide and highly active antiretroviral therapy &#40;HAART&#41; without delay&#46;<a class="elsevierStyleCrossRef" href="#bib0605"><span class="elsevierStyleSup">50</span></a></p></span><span id="sec0100" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Others</span><p id="par0180" class="elsevierStylePara elsevierViewall">For cases refractory to rituximab and several chemotherapy regimens&#44; anakinra has been suggested as a possible therapeutic rescue regimen&#46;<a class="elsevierStyleCrossRef" href="#bib0675"><span class="elsevierStyleSup">64</span></a> Bortezomib inhibits IL-6 secretion and decreases plasma IL-6 levels and those of CRP&#46;<a class="elsevierStyleCrossRef" href="#bib0680"><span class="elsevierStyleSup">65</span></a> A response to the proteasome inhibitor has been reported in cases of MCD associated with myeloma<a class="elsevierStyleCrossRef" href="#bib0685"><span class="elsevierStyleSup">66</span></a> and POEMS&#46;<a class="elsevierStyleCrossRefs" href="#bib0690"><span class="elsevierStyleSup">67&#44;68</span></a> In another case&#44; bortezomib was used with thalidomide&#46;<a class="elsevierStyleCrossRef" href="#bib0700"><span class="elsevierStyleSup">69</span></a> Other individual cases have shown a response to lenalidomide<a class="elsevierStyleCrossRef" href="#bib0705"><span class="elsevierStyleSup">70</span></a> and thalidomide alone or in combination with rituximab&#46;<a class="elsevierStyleCrossRef" href="#bib0710"><span class="elsevierStyleSup">71</span></a></p></span></span><span id="sec0105" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Future perspectives</span><p id="par0185" class="elsevierStylePara elsevierViewall">Despite recent developments&#44; anti-IL-6 therapy is not effective for all patients&#46; To date&#44; this therapy has not been studied in combination with other immunomodulatory or antiangiogenic therapies or with chemotherapy&#46; An initiative was created in 2012 by the global research network known as the Castleman Disease Collaborative Network &#40;CDCN&#44; <a id="intr0010" class="elsevierStyleInterRef" href="http://www.castlemannetwork.org/">www&#46;castlemannetwork&#46;org</a>&#41; for research into the pathogenesis of this disease&#46; The CDCN includes specialists from 13 countries and more than 200 member co-investigators in the United States&#44; Europe and Asia&#46; Based on this platform&#44; an international registry of MCD will be created&#44; which will help the study of this disease&#39;s natural history and its presentation forms and will help design multicenter clinical trials and consensus treatment protocols&#46; The CDCN will also propose the discovery of new viruses involved in the disease&#44; the identification of intracellular inflammatory pathways and studies on gene sequencing&#46;</p></span><span id="sec0110" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Conflicts of interest</span><p id="par0190" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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          "titulo" => "Background"
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              "titulo" => "Interleukin-6&#44; interleukin-6 receptor and vascular endothelial growth factor"
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              "titulo" => "Human herpesvirus 8"
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          "titulo" => "Unicentric Castleman&#39;s disease"
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          "titulo" => "Multicentric Castleman&#39;s disease"
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            0 => "Castleman&#39;s disease"
            1 => "Multicentric Castleman&#39;s disease"
            2 => "Angiofollicular lymph node hyperplasia"
            3 => "Human immunodeficiency virus"
            4 => "Human herpes virus 8"
            5 => "Rituximab"
            6 => "Tocilizumab"
            7 => "Siltuximab"
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            0 => "Enfermedad de Castleman"
            1 => "Enfermedad de Castleman multic&#233;ntrica"
            2 => "Hiperplasia linfoide angiofolicular"
            3 => "Virus de la inmunodeficiencia humana"
            4 => "Virus del herpes humano tipo 8"
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Castleman&#39;s disease is not just a single disease but rather an uncommon&#44; heterogeneous group of nonclonal lymphoproliferative disorders&#44; which have a broad spectrum of clinical expression&#46; Three histological types have been reported&#44; along with several clinical forms according to clinical presentation&#44; histological substrate and associated diseases&#46; Interleukin-6&#44; its receptor polymorphisms&#44; the human immunodeficiency virus and the human herpes virus 8 are involved in the etiopathogenesis of Castleman&#39;s disease&#46; The study of this disease has shed light on a syndrome whose incidence is unknown&#46; Despite recent significant advances in our understanding of this disease and the increasing therapeutic experience with rituximab&#44; tocilizumab and siltuximab&#44; there are still difficult questions concerning its etiology&#44; prognosis and optimal treatment&#46;</p></span>"
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        "titulo" => "Resumen"
        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">La enfermedad de Castleman no es una &#250;nica enfermedad&#46; Bajo este ep&#243;nimo se re&#250;ne un heterog&#233;neo grupo de trastornos linfoproliferativos no clonales&#44; muy infrecuentes&#44; con un amplio espectro de expresi&#243;n cl&#237;nica&#46; Se han descrito 3 tipos histol&#243;gicos&#44; junto con varias formas cl&#237;nicas&#44; seg&#250;n la forma de presentaci&#243;n&#44; el sustrato histol&#243;gico y las enfermedades asociadas&#46; La interleucina 6&#44; los polimorfismos del receptor de esta interleucina&#44; el virus de la inmunodeficiencia humana y el virus herpes humano tipo 8 est&#225;n implicados en la etiopatogenia y su estudio ha aportado luz al conocimiento de un s&#237;ndrome cuya incidencia es desconocida&#46; A pesar de avances recientes e importantes en su conocimiento y de la progresiva experiencia terap&#233;utica con rituximab&#44; tocilizumab y siltuximab&#44; a&#250;n existen preguntas dif&#237;ciles de contestar con los factores etiol&#243;gicos&#44; el abordaje terap&#233;utico &#243;ptimo y el pron&#243;stico&#46;</p></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Gonz&#225;lez Garc&#237;a A&#44; Moreno Cobo M&#193;&#44; Patier de la Pe&#241;a JL&#46; Diagn&#243;stico y tratamiento actual de la enfermedad de Castleman&#46; Rev Clin Esp&#46; 2016&#59;216&#58;146&#8211;156&#46;</p>"
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          "leyenda" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">ANA&#44; antinuclear antibodies&#59; HHV-8&#44; human herpes virus 8&#59; HIV&#44; human immunodeficiency virus&#59; HV&#44; hyaline vascular&#59; PC&#44; plasmocellular&#59; POEMS&#44; polyneuropathy&#44; organomegaly&#44; endocrinopathy&#44; monoclonal gammopathy and skin changes&#59; RA&#44; rheumatoid arthritis&#59; SLE&#44; systemic lupus erythematosus&#59; TTP&#44; thrombotic thrombocytopenic purpura&#46;</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Unicentric Castleman disease&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Multicentric Castleman disease&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Age&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">40 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Bimodal distribution &#40;30&#8211;40 years and 60 years&#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">Symptoms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Local compressive symptoms<br>Occasional autoimmune manifestations&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">General symptoms<br>Autoimmune manifestations<br>Association with POEMS&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">Organomegaly&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Uncommon&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Very common&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">Adenopathies&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Midline &#40;cervical&#44; mediastinal&#44; abdominal&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Multiple concomitant cervical stations&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">Fever&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Uncommon&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Very common&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">Abnormal laboratory test results&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Occasionally anemia&#44; hypergammaglobulinemia&#44; acute-phase reactants&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Very common&#58; anemia&#44; thrombopenia &#40;Evans syndrome&#41;&#44; hypoalbuminemia &#40;capillary leak&#41;&#44; increased levels of acute-phase reactants&#44; active urinary sediment&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">Associated systemic autoimmune manifestations&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Pemphigus<br>Bronchiolitis obliterans&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Evans syndrome<br>Cutaneous vasculitis &#40;leucocytoclastic&#41;<br>RA&#44; SLE<br>Positive autoantibodies &#40;ANA&#44; antiphospholipid&#44; Coombs&#41;<br>Positive cryoglobulins<br>TTP<br>Acquired hemophilia<br>Glomerulonephritis<br>Beh&#231;et disease&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">Associated diseases&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">POEMS<br>Myasthenia gravis<br>Hodgkin&#39;s and non-Hodgkin&#39;s lymphoma<br>Kaposi sarcoma<br>Dendritic cell sarcoma<br>Systemic amyloidosis<br>Interstitial nephritis<br>Pulmonary arterial hypertension<br>Lymphocytic interstitial pneumonia&#44; pulmonary fibrosis<br>Suprarenal failure&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">Histology&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Predominates in HV over Mixed-PC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Predominates in PC over mixed and less in HV&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">Association with HIV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&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">Association with HHV-8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes<br>There are negative HHV-8 variants&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">Prognosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Good&#44; if the lesion is controlled&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Aggressive<br>Recurrent<br>Occasional high mortality&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">Treatment employed&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Local therapy<br>Surgical exeresis&#44; radiation therapy&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Systemic therapy<br>&#40;corticosteroids&#44; chemotherapy&#44; rituximab&#44; siltuximab&#44; anakinra&#44; tocilizumab&#44; bortezomib&#44; lenalidomide&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
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          "en" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Clinical&#44; biological and evolutionary characteristics of Castleman&#39;s disease&#46;</p>"
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    "bibliografia" => array:2 [
      "titulo" => "References"
      "seccion" => array:1 [
        0 => array:2 [
          "identificador" => "bibs0005"
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            0 => array:3 [
              "identificador" => "bib0360"
              "etiqueta" => "1"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Localized mediastinal lymphnode hyperplasia resembling thymoma"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "B&#46; Castleman"
                            1 => "L&#46; Iverson"
                            2 => "V&#46;P&#46; Menendez"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Cancer"
                        "fecha" => "1956"
                        "volumen" => "9"
                        "paginaInicial" => "822"
                        "paginaFinal" => "830"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/13356266"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
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Review
Current diagnosis and treatment of Castleman's disease
Diagnóstico y tratamiento actual de la enfermedad de Castleman
A. González García, M.Á. Moreno Cobo, J.L. Patier de la Peña
Corresponding author
Servicio de Medicina Interna, Hospital Universitario Ramón y Cajal, Madrid, Spain
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          "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">&#40;A&#41; Large paracardiac mediastinal mass&#46; &#40;B&#41; Prominent feeding arteries that are irrigating the mass can be identified &#40;arrows&#41;&#46; &#40;C&#41; Patient with CD in whom an anterior mediastinal mass can be observed in the CT scan&#46; &#40;D&#41; There is uptake in the positron emission tomography&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Background</span><p id="par0005" class="elsevierStylePara elsevierViewall">Castleman&#39;s disease &#40;CD&#41;&#44; also known as angiofollicular lymph node hyperplasia&#44; was reported between 1954 and 1956 by Castleman&#44; a pathologist from the renowned Massachusetts General Hospital&#44; based on a series of 13 patients with mediastinal masses that mimicked thymomas&#46;<a class="elsevierStyleCrossRef" href="#bib0360"><span class="elsevierStyleSup">1</span></a> Over the last 60 years&#44; the term Castleman&#39;s disease has remained a general label for the heterogeneous collection of reactive lymphoproliferative processes that share well-defined histological traits but that differ in their patterns of location&#44; clinical expression and etiopathogenesis&#46; The term includes at least 4 diseases with different diagnoses and treatments&#58; &#40;1&#41; unicentric CD &#40;UCD&#41;&#59; &#40;2&#41; multicenter CD &#40;MCD&#41; associated with infection by the human herpes virus 8 &#40;HHV-8&#41; and by the human immunodeficiency virus &#40;HIV&#41; &#40;MCD-HHV-8&#43;&#47;HIV&#43;&#41;&#59; &#40;3&#41; MCD with infection by HHV-8 but not by HIV &#40;MCD-HHV-8&#43;&#47;HIV-&#41;&#59; and &#40;4&#41; MCD not associated with any of these viruses&#44; which has recently been called idiopathic MCD &#40;iMCD&#41;&#46; CD as a whole is considered a rare or minority disease&#46; Despite the considerable interest the disease has generated since its initial description and the significant developments in research &#40;more than 2700 entries in PubMed in September 2015&#41;&#44; there is still no consensus on its treatment&#46; Therefore&#44; one of the objectives of this review is to facilitate an understanding of the current therapeutic options&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Epidemiology</span><p id="par0010" class="elsevierStylePara elsevierViewall">The incidence of CD is unknown&#46; Based on patient cohort results extracted from databases&#44; a number of authors have estimated an incidence of approximately 21 cases per million inhabitants in the United States&#46;<a class="elsevierStyleCrossRef" href="#bib0365"><span class="elsevierStyleSup">2</span></a> The disease usually affects middle-aged people&#44; although with a bimodal distribution with a peak in young patients &#40;30&#8211;40 years&#41; and another at approximately 60 years&#46; The incidence is similar in both sexes&#46; The incidence of MCD-HHV-8&#43;&#47;HIV&#43; has increased in recent years due to the AIDS epidemic&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Classification</span><p id="par0015" class="elsevierStylePara elsevierViewall">CD is classically divided into 2 types based on the onset of isolated adenomegaly &#40;UCD&#41; or polyadenopathies &#40;MCD&#41;&#46; These 2 conditions have very different clinical and histological characteristics&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">CD causes an architectural change in the structure of the lymph nodes&#44; which affects all their compartments&#46; Histologically&#44; CD is classified into a hyaline-vascular &#40;HV&#41; form and a plasmocellular &#40;PC&#41; form&#44; although mixed variants can occasionally be observed&#44; especially in the MCD forms&#46;<a class="elsevierStyleCrossRef" href="#bib0370"><span class="elsevierStyleSup">3</span></a> In the HV form&#44; the follicles show atrophic germinal centers&#44; invaded by dendritic follicular cells and hyalinized vessels&#44; which form bridges and connections between them&#46; These centers are surrounded by mantle lymphocytes arranged in concentric rings that mimic the typical &#8220;onion layer&#8221; presentation&#46; Two subtypes have been reported in the HV form&#58; the classical lymphoid subtype and the stroma-cell rich subtype&#46; The latter subtype has been reported as a possible precursor of follicular dendritic cell sarcomas&#46;<a class="elsevierStyleCrossRef" href="#bib0375"><span class="elsevierStyleSup">4</span></a> In the PC variant&#44; the follicles show hyperplastic germinal centers&#44; and the interfollicular regions characteristically contain polyclonal plasma cells&#59; the characteristic vascular proliferation of the HV forms is not observed&#46; A third histological variant&#44; known as plasmablastic&#44; has recently been reported&#44;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">5</span></a> which occurs in particularly aggressive cases of MCD associated with HHV-8<a class="elsevierStyleCrossRef" href="#bib0385"><span class="elsevierStyleSup">6</span></a> and in the forms associated with POEMS syndrome<a class="elsevierStyleCrossRef" href="#bib0390"><span class="elsevierStyleSup">7</span></a> &#40;Crow-Fukase syndrome<a class="elsevierStyleCrossRef" href="#bib0395"><span class="elsevierStyleSup">8</span></a>&#41;&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">This morphological complexity carries over to clinical practice&#44; because there are patients who show an overlap between UCD and MCD&#46; In the early years&#44; there was certain controversy in the literature when describing the cases&#46; The limitations in disease staging and the limited experience with the histological analysis of samples fostered confusion among the clinical and histological variants&#46; Despite the improvements in diagnostic techniques and the experience acquired with CD&#44; there are still a number of issues concerning its classification&#46; Isolated unicentric masses&#44; which used to be identified with plain radiographs&#44; can now be accompanied by adenopathies in other regions or by reactive splenomegaly&#46; In a small number of cases&#44; the use of techniques such as computed tomography&#44; magnetic resonance and positron emission tomography blurs the unequivocal separation between UCD and MCD&#46; Despite these difficulties&#44; however&#44; the majority of patients can be classified into one of the 2 variants &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Pathophysiology</span><p id="par0030" class="elsevierStylePara elsevierViewall">There have been major advances in understanding the pathophysiology of CD&#46; There are various theories based on the repeated antigenic stimulus of nodal B lymphocytes in response to some etiological agent&#46; The most accepted model is the one derived from an abnormal overproduction of interleukin-6 &#40;IL-6&#41; by B lymphocytes of the mantle zone&#46; These cells are stimulated on most occasions by a viral antigen &#40;HHV-8&#41; and&#44; less frequently&#44; by endogenous or exogenous factors of still unknown origin&#46;<a class="elsevierStyleCrossRef" href="#bib0400"><span class="elsevierStyleSup">9</span></a> The inflammatory mediators and co-infection by HHV-8 and HIV are important factors for explaining the symptoms and etiopathogenesis of CD&#46; Below&#44; we show the role of each of the compounds that are involved in the pathogenesis of the disease&#46;</p><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Interleukin-6&#44; interleukin-6 receptor and vascular endothelial growth factor</span><p id="par0035" class="elsevierStylePara elsevierViewall">IL-6 behaves as an inducer of B-cell proliferation&#46; IL-6 is involved in the hepatic synthesis of acute-phase reactants and is responsible for the general symptoms&#44; which are characteristic of numerous systemic inflammatory diseases&#46;<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">10</span></a> IL-6 is also involved in hepcidin synthesis&#44; which regulates serum iron levels and is the main cause of anemia in chronic diseases&#46;<a class="elsevierStyleCrossRef" href="#bib0410"><span class="elsevierStyleSup">11</span></a></p><p id="par0040" class="elsevierStylePara elsevierViewall">Serum IL-6 concentrations are strikingly high in CD&#46; IL-6 levels are even higher than in other diseases such as rheumatoid arthritis and multiple myeloma&#44; where its pathogenic role is well-known&#46;<a class="elsevierStyleCrossRef" href="#bib0405"><span class="elsevierStyleSup">10</span></a> Excess IL-6 induces a proinflammatory syndrome that explains the general symptoms typical of MCD and increased levels of acute phase reactants&#46; High concentrations have also been reported in peripheral blood in cases of UCD that&#44; after the single mass has been removed&#44; experience a reduction&#44; with symptom remission&#46;<a class="elsevierStyleCrossRef" href="#bib0415"><span class="elsevierStyleSup">12</span></a> Differences in clinical expression in various populations have been identified&#46; For example&#44; very prominent skin manifestations have been reported in Asians&#44; as well as pemphigus&#44; renal damage and an increased frequency of interstitial pulmonary involvement&#46;<a class="elsevierStyleCrossRef" href="#bib0420"><span class="elsevierStyleSup">13</span></a> Furthermore&#44; differences have been reported in particular polymorphisms that affect IL-6R and that are associated with higher plasma IL-6R concentrations in patients with iMCD&#46;<a class="elsevierStyleCrossRef" href="#bib0425"><span class="elsevierStyleSup">14</span></a></p><p id="par0045" class="elsevierStylePara elsevierViewall">One of the functions of IL-6 is to induce vascular endothelial growth factor &#40;VEGF&#41; expression&#46;<a class="elsevierStyleCrossRef" href="#bib0430"><span class="elsevierStyleSup">15</span></a> It is believed that this compound causes hypervascularization of the germinal regions of the lymph nodes in CD&#46; Several researchers have found high serum VEGF levels in patients with CD&#44; as well as its overexpression in plasma cells and interfollicular regions&#46;<a class="elsevierStyleCrossRef" href="#bib0435"><span class="elsevierStyleSup">16</span></a> Although the involvement of VEGF in the pathogenesis of CD is indisputable&#44; its mechanism of action is still unclear&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">These findings&#44; along with the usefulness of blocking this inflammatory pathway as a possible therapy&#44;<a class="elsevierStyleCrossRef" href="#bib0440"><span class="elsevierStyleSup">17</span></a> have established the fundamental role of IL-6 in the development of MCD and the perpetuation of its symptoms&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Human herpesvirus 8</span><p id="par0055" class="elsevierStylePara elsevierViewall">With the HIV epidemic in the 1980s&#44; there was a reported increase in the incidence of Kaposi&#39;s sarcoma &#40;KS&#41;&#44; a previously uncommon skin cancer&#46; In 1994&#44; a new gamma virus belonging to the herpes virus family was sequenced in the biopsies of patients with KS&#58; HHV-8&#46;<a class="elsevierStyleCrossRef" href="#bib0445"><span class="elsevierStyleSup">18</span></a> In addition to KS&#44; there are other diseases that are closely associated with this virus&#44; such as body cavity lymphoma and MCD&#46; The mechanism of action of HHV-8 consists of the secretion of viral particles homologs of human IL-6 &#40;vIL-6&#41; by B cells of the infected mantle&#46; These particles hyperstimulate the production of B cells and the secretion of human IL-6&#44; perpetuating the inflammatory cycle&#46;<a class="elsevierStyleCrossRef" href="#bib0450"><span class="elsevierStyleSup">19</span></a> This pathogenic mechanism has been confirmed due to the finding of a close correlation between disease activity and viral load&#46;<a class="elsevierStyleCrossRef" href="#bib0455"><span class="elsevierStyleSup">20</span></a> It has been postulated that HHV-8 is a necessary but insufficient agent for causing the disease&#46; HHV-8 has been reported in up to 40&#37; of HIV- patients with MCD and in up to 100&#37; of a series of patients with MCD and positive HIV serology&#46;<a class="elsevierStyleCrossRef" href="#bib0460"><span class="elsevierStyleSup">21</span></a> This situation contrasts with the pathogenic mechanism of MCD and HHV-8&#44; given that its initial stimulation is polyclonal&#46; HHV-8 tends to perpetuate preferentially in plasmoblasts that express IgM&#955; light chains but not in those that express other types of Ig or k light-chain&#46; Despite this monotypic expression&#44; infected B cells do not show rearrangements of the heavy chains &#40;IgH&#41; and maintain their polyclonal character&#46;<a class="elsevierStyleCrossRef" href="#bib0465"><span class="elsevierStyleSup">22</span></a> The high-power replication of HHV-8 in monotypic B cells can over time cause IgH rearrangements&#44; which lead to microlymphomas and even developed plasmablastic lymphomas&#46;<a class="elsevierStyleCrossRef" href="#bib0380"><span class="elsevierStyleSup">5</span></a></p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0055">Human immunodeficiency virus</span><p id="par0060" class="elsevierStylePara elsevierViewall">MCD is considered a disease related to the complex of AIDS-associated lymphadenopathies&#44; although its incidence is low within that spectrum &#40;2&#37;&#41;&#46; A fundamental role in MCD has been attributed to HIV&#44; given its high replicative capacity and persistent stimulation of B lymphocytes&#46;<a class="elsevierStyleCrossRef" href="#bib0470"><span class="elsevierStyleSup">23</span></a> However&#44; it is currently believed that immunosuppression and co-infection with HHV-8 are the main pathogenic factors of MCD&#46;</p></span></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0060">Unicentric Castleman&#39;s disease</span><p id="par0065" class="elsevierStylePara elsevierViewall">The paradigm of UCD corresponds to Castleman&#39;s original description in 1956&#46;<a class="elsevierStyleCrossRef" href="#bib0360"><span class="elsevierStyleSup">1</span></a> Approximately 90&#37; of cases correspond to the histological variant HV&#46; Unlike the multicentric form&#44; little is known about the etiopathogenesis of UCD&#46; Excess IL-6 secretion has been found only in isolated cases with general symptoms&#46; An association with either HHV-8 or HIV infection has not been reported&#46; Although it can occur at any age&#44; UCD tends to appear at younger ages and has a certain characteristic predilection for the female sex&#46;<a class="elsevierStyleCrossRef" href="#bib0475"><span class="elsevierStyleSup">24</span></a></p><p id="par0070" class="elsevierStylePara elsevierViewall">UCD is usually asymptomatic in most cases&#46; The main characteristics of UCD are listed in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46; The most common symptoms are isolated swelling of a lymph node station&#46; Symptoms can appear resulting from the local compression of neighboring anatomical structures&#46; If systemic manifestations occur&#44; they usually correspond to a PC histological pattern&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">Diverse local disorders have been reported&#44; including mediastinal&#44; cervical&#44; abdominal and retroperitoneal disorders&#46; Mediastinal masses can grow to a considerable size and present signs of hypervascularization&#44; developing abnormal feeding vessels from the bronchial arteries &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1A and B</a>&#41;&#46; Paraneoplastic pemphigus <a class="elsevierStyleCrossRef" href="#bib0480"><span class="elsevierStyleSup">25</span></a> and bronchiolitis obliterans<a class="elsevierStyleCrossRef" href="#bib0485"><span class="elsevierStyleSup">26</span></a> have characteristically been reported as associated systemic manifestations&#46; In these cases&#44; the prognosis is poor due to the complications resulting from progressive respiratory failure and infections&#44; which in many cases lead to death&#46;<a class="elsevierStyleCrossRef" href="#bib0490"><span class="elsevierStyleSup">27</span></a></p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0080" class="elsevierStylePara elsevierViewall">Typically&#44; there are no specific abnormal laboratory test results&#46; Some patients can experience anemia with an iron deficiency profile&#44; chronic or mixed disorders&#44; hypoalbuminemia&#44; hypergammaglobulinemia&#44; increased erythrocyte sedimentation rates and higher C-reactive protein &#40;CRP&#41; levels&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Multicentric Castleman&#39;s disease</span><p id="par0085" class="elsevierStylePara elsevierViewall">MCD has a very different profile from that of the unicentric variant&#46; MCD can be more or less severe depending on whether it is associated with clonal conditions such as the syndrome characterized by polyneuropathy&#44; organomegaly&#44; endocrinopathy&#44; monoclonal gammopathy and skin changes &#40;POEMS syndrome&#41; and HIV or HHV-8 infection&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall">Prior to the AIDS epidemic&#44; MCD presented in patients in the sixth decade of life&#46; However&#44; MCD associated with HIV usually affects younger populations&#46;<a class="elsevierStyleCrossRefs" href="#bib0495"><span class="elsevierStyleSup">28&#44;29</span></a> The evolution of MCD has been changed by the behavior of HIV infection in the last 2 decades&#46; At the start of the 1990s&#44; there was an increase in the incidence of MCD&#44; which decreased by the end of the 2000s&#44; thanks to the implementation of antiretroviral treatment&#46;<a class="elsevierStyleCrossRef" href="#bib0505"><span class="elsevierStyleSup">30</span></a> However&#44; there are subtypes of MCD depending on whether it is associated with HIV&#44; HHV-8 or both&#46; In HIV&#47;HHV-8&#43; patients&#44; the disease assumes a more aggressive and abrupt course&#46; Given the frequent coexistence of HIV infection&#44; KS and MCD&#44; it was believed that HHV-8 was essential for developing the disease&#46; In recent years&#44; however&#44; a number of cases of MCD associated with HIV with negative tests for HHV-8 have been published&#46;<a class="elsevierStyleCrossRef" href="#bib0510"><span class="elsevierStyleSup">31</span></a> Moreover&#44; there is a patient group with MCD that is not infected by HIV or HHV-8&#46; In these cases&#44; the etiology is unknown&#44; although numerous theories have been proposed&#44; including infectious causes by still unidentified agents&#44; underlying autoimmune diseases&#44; genetic mutations in the germinal line that affect the innate immunity and even malignancies&#44; as promoters of this type of idiopathic MCD&#46;<a class="elsevierStyleCrossRef" href="#bib0515"><span class="elsevierStyleSup">32</span></a> Current research efforts are focused on ascertaining the etiology in this subtype&#46;</p><span id="sec0050" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Clinical presentation</span><p id="par0095" class="elsevierStylePara elsevierViewall">The clinical expression varies and depends on the extent of the disease&#44; the blood cytokine concentration and positive&#47;negative state of HIV and HHV-8 virus infection&#46; Most patients have prominent general symptoms &#40;fever&#44; hyporexia&#44; night-time sweats&#44; asthenia&#41;&#44; along with those resulting from lymph node and visceral involvement&#46;<a class="elsevierStyleCrossRef" href="#bib0520"><span class="elsevierStyleSup">33</span></a> Patients with POEMS symptomatology present the clinical characteristics of that syndrome &#40;skin changes and neurological and endocrine disorders&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0525"><span class="elsevierStyleSup">34</span></a> sometimes accompanied by osteosclerotic bone involvement&#46;<a class="elsevierStyleCrossRef" href="#bib0530"><span class="elsevierStyleSup">35</span></a><a class="elsevierStyleCrossRef" href="#fig0010">Fig&#46; 2</a> shows a case of idiopathic MCD&#44; with a monoclonal peak and multiple osteosclerotic lesions&#44; with osteoblastic activity in the scintigraphy&#46;</p><elsevierMultimedia ident="fig0010"></elsevierMultimedia><p id="par0100" class="elsevierStylePara elsevierViewall">From the neurological point of view&#44; MCD can present as peripheral motor polyneuropathy in the context of POEMS or can affect the optic nerve in the form of papilledema&#46;<a class="elsevierStyleCrossRef" href="#bib0535"><span class="elsevierStyleSup">36</span></a> There have been reports of other findings resulting from hypoalbuminemia in the context of TAFRO syndrome &#40;a Japanese variant of MCD known as Castleman-Kojima disease&#44; which combines thrombocytopenia&#44; anasarca&#44; reticulin fibrosis&#44; renal dysfunction and organomegaly&#41;&#44;<a class="elsevierStyleCrossRef" href="#bib0540"><span class="elsevierStyleSup">37</span></a> interstitial pulmonary involvement and even respiratory distress &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0545"><span class="elsevierStyleSup">38</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">In iMCD&#44; the clinical spectrum is broader than in the forms associated with HHV-8 and HIV&#46; Symptom severity varies from flu-like conditions and generalized lymphadenopathy with intense constitutional symptoms to the development of multiple organ failure in the context of a macrophage-activation syndrome&#46;<a class="elsevierStyleCrossRef" href="#bib0550"><span class="elsevierStyleSup">39</span></a> The disease course can be relapsing without treatment&#44; gradually progressive or include severe exacerbations that lead to death&#46;</p><p id="par0110" class="elsevierStylePara elsevierViewall">Occasionally&#44; diseases need to be ruled out that can cause Castleman-like histological findings in the lymph nodes&#44; such as systemic lupus erythematosus&#44; Epstein&#8211;Barr virus infection&#44; syphilis&#44; a number of lymphomas and IgG4-related lymphadenopathy&#46; Nevertheless&#44; associations between MCD and the abovementioned conditions have been reported&#44; which illustrates the diagnostic complexity&#46;</p></span><span id="sec0055" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Abnormal laboratory test results</span><p id="par0115" class="elsevierStylePara elsevierViewall">Abnormal laboratory test results are common&#46; Anemia of chronic disease is usually the most common&#46; Hemolytic anemia&#44; isolated or accompanied by thrombopenia&#44; in the context of Evans syndrome can also be observed&#46;<a class="elsevierStyleCrossRef" href="#bib0555"><span class="elsevierStyleSup">40</span></a> A multitude of immune-mediated pathogenic disorders have been documented &#40;<a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#41;&#44; as well as positivity for various autoantibodies&#44; rheumatoid factor and cryoglobulins&#46;<a class="elsevierStyleCrossRef" href="#bib0560"><span class="elsevierStyleSup">41</span></a> For cases in which an association with POEMS is suspected&#44; the detection of monoclonal paraprotein through immunoelectrophoresis of blood and urine can be useful&#46;</p></span></span><span id="sec0060" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Treatment</span><p id="par0120" class="elsevierStylePara elsevierViewall">UCD&#44; MCD-HHV-8 &#40;with or without HIV coinfection&#41; and iMCD have different treatments&#46; It is advisable to provide multidisciplinary care in reference centers that have a medical expert coordinator &#40;hematologist or internist&#41; and several medical and surgical specialties involved in the process&#46; HIV units and the participation of a pathologist with experience in diagnosis are also instrumental&#46;</p><span id="sec0065" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Unicentric Castleman&#39;s disease</span><p id="par0125" class="elsevierStylePara elsevierViewall">Complete surgical exeresis of the adenopathic cluster is the treatment of choice&#46; Between 95&#37; and 100&#37; of cases remain cured in the long term&#46;<a class="elsevierStyleCrossRef" href="#bib0475"><span class="elsevierStyleSup">24</span></a> When the surgical approach due to the location or close relationship with vital structures is complex&#44; neoadjuvant treatment with steroids and rituximab can reduce the volume and margins of the cluster&#44; facilitating complete exeresis&#46;<a class="elsevierStyleCrossRef" href="#bib0565"><span class="elsevierStyleSup">42</span></a> In some cases&#44; full remission has been reported with rituximab&#44; without needing subsequent surgery&#46;<a class="elsevierStyleCrossRef" href="#bib0570"><span class="elsevierStyleSup">43</span></a> Presurgical artery embolization techniques for large masses are acceptable in some cases&#46;<a class="elsevierStyleCrossRef" href="#bib0575"><span class="elsevierStyleSup">44</span></a> Radiation therapy has been relegated to special conditions&#44; despite the good remission rates obtained in historical series&#46;<a class="elsevierStyleCrossRef" href="#bib0580"><span class="elsevierStyleSup">45</span></a></p></span><span id="sec0070" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Multicentric Castleman&#39;s disease</span><p id="par0130" class="elsevierStylePara elsevierViewall">There is no unanimous consensus on the optimal treatment for the variants of MCD&#46; The low prevalence and variable course &#40;occasionally relapsing or rapidly progressive&#41; makes it difficult to obtain a uniform collection of patients to conduct randomized prospective studies&#46; There has been only one randomized&#44; double-blind trial to test the efficacy of siltuximab versus placebo &#40;a study that included 79 patients&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0585"><span class="elsevierStyleSup">46</span></a></p><p id="par0135" class="elsevierStylePara elsevierViewall">A summary of the evidence from various therapies is provided below&#46; The recommendations for each form of MCD are listed&#44; showing a simple scheme that takes into account the etiologic agents involved and the severity of the clinical condition &#40;<a class="elsevierStyleCrossRef" href="#fig0015">Fig&#46; 3</a>&#41;&#46;</p><elsevierMultimedia ident="fig0015"></elsevierMultimedia></span><span id="sec0075" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Chemotherapy</span><p id="par0140" class="elsevierStylePara elsevierViewall">Monotherapy with vinblastine&#44; etoposide or doxorubicin has achieved symptom control and a partial unsustained response&#46;<a class="elsevierStyleCrossRef" href="#bib0590"><span class="elsevierStyleSup">47</span></a> CHOP &#40;cyclophosphamide&#44; doxorubicin&#44; vincristine&#44; prednisone&#41; or CVAD &#40;cyclophosphamide&#44; vincristine&#44; doxorubicin and dexamethasone&#41; combination chemotherapy is preferable to monotherapy because the former has achieved higher response rates and longer responses in 50&#37; of cases in studies with 4-year follow-ups&#46;<a class="elsevierStyleCrossRef" href="#bib0520"><span class="elsevierStyleSup">33</span></a> Polychemotherapy should be considered in clinical forms with multiple-organ damage&#46;<a class="elsevierStyleCrossRef" href="#bib0595"><span class="elsevierStyleSup">48</span></a></p></span><span id="sec0080" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Glucocorticoids</span><p id="par0145" class="elsevierStylePara elsevierViewall">Glucocorticoids have frequently been used in MCD&#46; The response rate is usually high &#40;60&#8211;70&#37;&#41; but the response is generally not sustained&#44; and the treatment should not be considered long-term&#46; In patients with MCD-HHV-8&#43;&#47;HIV&#43;&#44; Glucocorticoids increase mortality due to infections and the development of KS&#46;<a class="elsevierStyleCrossRef" href="#bib0600"><span class="elsevierStyleSup">49</span></a> At present&#44; the primary indication for glucocorticoids is limited to the initial control of symptoms&#44; using them for short periods or as part of combined chemotherapy regimens&#44; such as CHOP and CVAD with or without rituximab&#46;</p></span><span id="sec0085" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Rituximab</span><p id="par0150" class="elsevierStylePara elsevierViewall">Rituximab&#44; alone or combined with chemotherapy&#44; has significant activity in all variants of ECM&#44;<a class="elsevierStyleCrossRefs" href="#bib0595"><span class="elsevierStyleSup">48&#44;50&#8211;52</span></a> even when used as rescue therapy&#46;<a class="elsevierStyleCrossRefs" href="#bib0620"><span class="elsevierStyleSup">53&#44;54</span></a> A percentage of patients with HIV infection can experience exacerbation of preexisting KS lesions following treatment with rituximab&#46;<a class="elsevierStyleCrossRef" href="#bib0630"><span class="elsevierStyleSup">55</span></a> Caution is advised for these patients&#44; especially in conditions of severe immunosuppression &#40;detectable viral load&#44; low CD4 or active prior KS&#41;&#46; Immune-mediated phenomena can also occur after therapy with rituximab&#46;<a class="elsevierStyleCrossRef" href="#bib0635"><span class="elsevierStyleSup">56</span></a> A prospective study with 24 patients with HIV&#43; MCD assessed rituximab as an adjuvant agent to chemotherapy to maintain remission&#46;<a class="elsevierStyleCrossRef" href="#bib0640"><span class="elsevierStyleSup">57</span></a> With the strategy of one weekly dose of rituximab &#40;375<span class="elsevierStyleHsp" style=""></span>mg&#47;m<span class="elsevierStyleSup">2</span>&#41; for 4 weeks&#44; a response rate of 92&#37; was observed&#44; with full remission in 71&#37; at 13 months&#46; In a study of 49 patients with HIV&#43; MCD&#44; 35 patients were treated with rituximab and 14 with rituximab and etoposide &#40;a group considered at greater risk&#41;&#46; Progression-free survival at 2 and 5 years for all treated patients was 85&#37; and 61&#37;&#44; respectively&#46; The 8 cases among both groups with histologically confirmed relapse responded to retreatment with rituximab&#46;<a class="elsevierStyleCrossRef" href="#bib0605"><span class="elsevierStyleSup">50</span></a> The use of rituximab&#44; however&#44; decreased the transformation to lymphoproliferative neoplasia in a cohort of patients with MCD-HHV-8&#43;&#47;HIV&#43;&#46;<a class="elsevierStyleCrossRef" href="#bib0615"><span class="elsevierStyleSup">52</span></a></p></span><span id="sec0090" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0110">Anti-interleukin-6</span><p id="par0155" class="elsevierStylePara elsevierViewall">The use of monoclonal antibodies directed against IL-6 &#40;siltuximab&#41; or its receptor &#40;tocilizumab&#41; has shown clinical efficacy in iMCD&#46;<a class="elsevierStyleCrossRefs" href="#bib0645"><span class="elsevierStyleSup">58&#8211;60</span></a> Tocilizumab has been approved for MCD in Japan since 2005&#44; while siltuximab has been approved in the United States and Europe for treating iMCD since 2014&#46; In Spain&#44; the Ministry of Health is currently establishing the price&#44; an indispensable condition for marketing the drug&#46;</p><p id="par0160" class="elsevierStylePara elsevierViewall">In a phase II&#44; randomized&#44; double-blind multicenter study of siltuximab &#40;11<span class="elsevierStyleHsp" style=""></span>mg&#47;kg intravenously infused every 3 weeks&#41; vs&#46; placebo in 79 patients with moderately symptomatic iMCD&#44; the overall response rate was higher in the treated group &#40;34&#37; vs&#46; 0&#37;&#41;&#44; with improvement in the anemia&#44; inflammation markers &#40;CRP&#44; erythrocyte sedimentation rate and fibrinogen&#41; and the baseline clinical state&#46; This study continues in a single open arm for the patients who responded&#44; with the objective of understanding long-term safety and efficacy&#46;<a class="elsevierStyleCrossRef" href="#bib0585"><span class="elsevierStyleSup">46</span></a></p><p id="par0165" class="elsevierStylePara elsevierViewall">The safety and efficacy of tocilizumab was assessed in a prospective&#44; open multicenter trial that included 28 symptomatic patients with the PC variant of MCD<a class="elsevierStyleCrossRef" href="#bib0660"><span class="elsevierStyleSup">61</span></a> and with no HIV and 2 patients with HHV-8&#43;&#46; The patients were initially treated with an intravenous dosage of 8<span class="elsevierStyleHsp" style=""></span>mg&#47;kg every 2 weeks for 16 weeks&#44; with a subsequent extension phase that allowed for a varying dosage&#46; After 16 weeks of treatment&#44; improvement was observed in the clinical and laboratory parameters&#44; with a reduction in the daily dose of glucocorticoids and without needing treatment with blood products&#46;</p><p id="par0170" class="elsevierStylePara elsevierViewall">In short&#44; therapy directed against IL-6 is a viable option and an important advance in iMCD&#46; Nevertheless&#44; long-term follow-up is needed to establish the optimal treatment duration and to determine whether the initial response rates translate into greater survival&#46;</p></span><span id="sec0095" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0115">Antivirals</span><p id="par0175" class="elsevierStylePara elsevierViewall">The clinical manifestations of MCD are correlated with the viral load of serum HHV-8&#44; which indicates that they could be directly related to the replication of the virus&#46;<a class="elsevierStyleCrossRef" href="#bib0665"><span class="elsevierStyleSup">62</span></a> In a pilot study&#44; 14 patients with MCD-HHV-8&#43;&#47;HIV&#43; were treated with high-dose zidovudine &#40;600<span class="elsevierStyleHsp" style=""></span>mg orally every 6<span class="elsevierStyleHsp" style=""></span>h&#41; and valganciclovir &#40;900<span class="elsevierStyleHsp" style=""></span>mg orally every 12<span class="elsevierStyleHsp" style=""></span>h&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0670"><span class="elsevierStyleSup">63</span></a> After a median follow-up of 43 months&#44; overall survival at 12 months was 86&#37;&#46; Although there are no comparative studies on the addition of antivirals&#44; experts recommend combining ganciclovir or valganciclovir with rituximab for patients with MCD-HHV-8&#43;&#47;HIV&#43;&#46;<a class="elsevierStyleCrossRef" href="#bib0610"><span class="elsevierStyleSup">51</span></a> The more symptomatic patients&#44; those with preexisting KS or a greater degree of immunosuppression&#44; are considered at high risk and should therefore undergo chemotherapy with etoposide and highly active antiretroviral therapy &#40;HAART&#41; without delay&#46;<a class="elsevierStyleCrossRef" href="#bib0605"><span class="elsevierStyleSup">50</span></a></p></span><span id="sec0100" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0120">Others</span><p id="par0180" class="elsevierStylePara elsevierViewall">For cases refractory to rituximab and several chemotherapy regimens&#44; anakinra has been suggested as a possible therapeutic rescue regimen&#46;<a class="elsevierStyleCrossRef" href="#bib0675"><span class="elsevierStyleSup">64</span></a> Bortezomib inhibits IL-6 secretion and decreases plasma IL-6 levels and those of CRP&#46;<a class="elsevierStyleCrossRef" href="#bib0680"><span class="elsevierStyleSup">65</span></a> A response to the proteasome inhibitor has been reported in cases of MCD associated with myeloma<a class="elsevierStyleCrossRef" href="#bib0685"><span class="elsevierStyleSup">66</span></a> and POEMS&#46;<a class="elsevierStyleCrossRefs" href="#bib0690"><span class="elsevierStyleSup">67&#44;68</span></a> In another case&#44; bortezomib was used with thalidomide&#46;<a class="elsevierStyleCrossRef" href="#bib0700"><span class="elsevierStyleSup">69</span></a> Other individual cases have shown a response to lenalidomide<a class="elsevierStyleCrossRef" href="#bib0705"><span class="elsevierStyleSup">70</span></a> and thalidomide alone or in combination with rituximab&#46;<a class="elsevierStyleCrossRef" href="#bib0710"><span class="elsevierStyleSup">71</span></a></p></span></span><span id="sec0105" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0125">Future perspectives</span><p id="par0185" class="elsevierStylePara elsevierViewall">Despite recent developments&#44; anti-IL-6 therapy is not effective for all patients&#46; To date&#44; this therapy has not been studied in combination with other immunomodulatory or antiangiogenic therapies or with chemotherapy&#46; An initiative was created in 2012 by the global research network known as the Castleman Disease Collaborative Network &#40;CDCN&#44; <a id="intr0010" class="elsevierStyleInterRef" href="http://www.castlemannetwork.org/">www&#46;castlemannetwork&#46;org</a>&#41; for research into the pathogenesis of this disease&#46; The CDCN includes specialists from 13 countries and more than 200 member co-investigators in the United States&#44; Europe and Asia&#46; Based on this platform&#44; an international registry of MCD will be created&#44; which will help the study of this disease&#39;s natural history and its presentation forms and will help design multicenter clinical trials and consensus treatment protocols&#46; The CDCN will also propose the discovery of new viruses involved in the disease&#44; the identification of intracellular inflammatory pathways and studies on gene sequencing&#46;</p></span><span id="sec0110" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0130">Conflicts of interest</span><p id="par0190" class="elsevierStylePara elsevierViewall">The authors declare that they have no conflicts of interest&#46;</p></span></span>"
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        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Castleman&#39;s disease is not just a single disease but rather an uncommon&#44; heterogeneous group of nonclonal lymphoproliferative disorders&#44; which have a broad spectrum of clinical expression&#46; Three histological types have been reported&#44; along with several clinical forms according to clinical presentation&#44; histological substrate and associated diseases&#46; Interleukin-6&#44; its receptor polymorphisms&#44; the human immunodeficiency virus and the human herpes virus 8 are involved in the etiopathogenesis of Castleman&#39;s disease&#46; The study of this disease has shed light on a syndrome whose incidence is unknown&#46; Despite recent significant advances in our understanding of this disease and the increasing therapeutic experience with rituximab&#44; tocilizumab and siltuximab&#44; there are still difficult questions concerning its etiology&#44; prognosis and optimal treatment&#46;</p></span>"
      ]
      "es" => array:2 [
        "titulo" => "Resumen"
        "resumen" => "<span id="abst0010" class="elsevierStyleSection elsevierViewall"><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">La enfermedad de Castleman no es una &#250;nica enfermedad&#46; Bajo este ep&#243;nimo se re&#250;ne un heterog&#233;neo grupo de trastornos linfoproliferativos no clonales&#44; muy infrecuentes&#44; con un amplio espectro de expresi&#243;n cl&#237;nica&#46; Se han descrito 3 tipos histol&#243;gicos&#44; junto con varias formas cl&#237;nicas&#44; seg&#250;n la forma de presentaci&#243;n&#44; el sustrato histol&#243;gico y las enfermedades asociadas&#46; La interleucina 6&#44; los polimorfismos del receptor de esta interleucina&#44; el virus de la inmunodeficiencia humana y el virus herpes humano tipo 8 est&#225;n implicados en la etiopatogenia y su estudio ha aportado luz al conocimiento de un s&#237;ndrome cuya incidencia es desconocida&#46; A pesar de avances recientes e importantes en su conocimiento y de la progresiva experiencia terap&#233;utica con rituximab&#44; tocilizumab y siltuximab&#44; a&#250;n existen preguntas dif&#237;ciles de contestar con los factores etiol&#243;gicos&#44; el abordaje terap&#233;utico &#243;ptimo y el pron&#243;stico&#46;</p></span>"
      ]
    ]
    "NotaPie" => array:1 [
      0 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Gonz&#225;lez Garc&#237;a A&#44; Moreno Cobo M&#193;&#44; Patier de la Pe&#241;a JL&#46; Diagn&#243;stico y tratamiento actual de la enfermedad de Castleman&#46; Rev Clin Esp&#46; 2016&#59;216&#58;146&#8211;156&#46;</p>"
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          "en" => "<p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">&#40;A&#41; Large paracardiac mediastinal mass&#46; &#40;B&#41; Prominent feeding arteries that are irrigating the mass can be identified &#40;arrows&#41;&#46; &#40;C&#41; Patient with CD in whom an anterior mediastinal mass can be observed in the CT scan&#46; &#40;D&#41; There is uptake in the positron emission tomography&#46;</p>"
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          "en" => "<p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">&#40;A and B&#41; CT scan in sagittal and axial planes&#44; with multiple osteosclerotic lesions in the sternum&#44; thoracic spine and lumbar spine&#46; &#40;C&#41; The scintigraphy shows the same lesions&#44; which have significant tracer uptake due to its osteoblastic activity &#40;arrows&#41;&#46;</p>"
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          "en" => "<p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Treatment of Castleman&#39;s disease&#46;</p>"
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      ]
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        "tabla" => array:2 [
          "leyenda" => "<p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">ANA&#44; antinuclear antibodies&#59; HHV-8&#44; human herpes virus 8&#59; HIV&#44; human immunodeficiency virus&#59; HV&#44; hyaline vascular&#59; PC&#44; plasmocellular&#59; POEMS&#44; polyneuropathy&#44; organomegaly&#44; endocrinopathy&#44; monoclonal gammopathy and skin changes&#59; RA&#44; rheumatoid arthritis&#59; SLE&#44; systemic lupus erythematosus&#59; TTP&#44; thrombotic thrombocytopenic purpura&#46;</p>"
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                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="" valign="top" scope="col" style="border-bottom: 2px solid black">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Unicentric Castleman disease&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Multicentric Castleman disease&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Age&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">40 years&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Bimodal distribution &#40;30&#8211;40 years and 60 years&#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">Symptoms&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Local compressive symptoms<br>Occasional autoimmune manifestations&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">General symptoms<br>Autoimmune manifestations<br>Association with POEMS&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">Organomegaly&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Uncommon&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Very common&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">Adenopathies&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Midline &#40;cervical&#44; mediastinal&#44; abdominal&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Multiple concomitant cervical stations&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">Fever&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Uncommon&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Very common&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">Abnormal laboratory test results&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Occasionally anemia&#44; hypergammaglobulinemia&#44; acute-phase reactants&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Very common&#58; anemia&#44; thrombopenia &#40;Evans syndrome&#41;&#44; hypoalbuminemia &#40;capillary leak&#41;&#44; increased levels of acute-phase reactants&#44; active urinary sediment&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">Associated systemic autoimmune manifestations&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Pemphigus<br>Bronchiolitis obliterans&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Evans syndrome<br>Cutaneous vasculitis &#40;leucocytoclastic&#41;<br>RA&#44; SLE<br>Positive autoantibodies &#40;ANA&#44; antiphospholipid&#44; Coombs&#41;<br>Positive cryoglobulins<br>TTP<br>Acquired hemophilia<br>Glomerulonephritis<br>Beh&#231;et disease&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">Associated diseases&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">POEMS<br>Myasthenia gravis<br>Hodgkin&#39;s and non-Hodgkin&#39;s lymphoma<br>Kaposi sarcoma<br>Dendritic cell sarcoma<br>Systemic amyloidosis<br>Interstitial nephritis<br>Pulmonary arterial hypertension<br>Lymphocytic interstitial pneumonia&#44; pulmonary fibrosis<br>Suprarenal failure&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">Histology&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Predominates in HV over Mixed-PC&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Predominates in PC over mixed and less in HV&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">Association with HIV&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&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">Association with HHV-8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes<br>There are negative HHV-8 variants&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">Prognosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Good&#44; if the lesion is controlled&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Aggressive<br>Recurrent<br>Occasional high mortality&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">Treatment employed&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Local therapy<br>Surgical exeresis&#44; radiation therapy&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Systemic therapy<br>&#40;corticosteroids&#44; chemotherapy&#44; rituximab&#44; siltuximab&#44; anakinra&#44; tocilizumab&#44; bortezomib&#44; lenalidomide&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
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          "en" => "<p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Clinical&#44; biological and evolutionary characteristics of Castleman&#39;s disease&#46;</p>"
        ]
      ]
    ]
    "bibliografia" => array:2 [
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ISSN: 22548874
Original language: English
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