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      OncoTargets and Therapy (submit here)

      This international, peer-reviewed Open Access journal by Dove Medical Press focuses on the pathological basis of cancers, potential targets for therapy and treatment protocols to improve the management of cancer patients. Publishing high-quality, original research on molecular aspects of cancer, including the molecular diagnosis, since 2008. Sign up for email alerts here. 50,877 Monthly downloads/views I 4.345 Impact Factor I 7.0 CiteScore I 0.81 Source Normalized Impact per Paper (SNIP) I 0.811 Scimago Journal & Country Rank (SJR)

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      Follicular dendritic cell sarcoma: two rare cases and a brief review of the literature

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          Abstract

          Follicular dendritic cell sarcoma (FDCS) is a rare malignant tumor recognized in recent years. It accounts for only 0.4% of soft-tissue sarcomas, and its underlying causes are largely unknown. A correct diagnosis can be difficult to make. Diagnosis of FDCS depends on the combined clinical examination, histopathologic features, electron microscopic examination and confirmation with immunohistochemical studies. Here, we report two rare cases of FDCS: one case involving multiple bones, and the other involving extensive abdominal and pelvic cavities. Clinical, histopathological, and immunohistochemical aspects, therapeutic options, and a related literature review of the two cases are discussed. As the prevalence of FDCS is increasing, the details of these rare cases may highlight the importance and facilitate treatment of similar diseases.

          Most cited references23

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          A primary lymph node malignancy with features suggestive of dendritic reticulum cell differentiation. A report of 4 cases.

          Four cases are described of a nonlymphomatous primary lymph node malignancy characterized by the proliferation of oval and spindle cells, occasionally multinucleated, and arranged in a nesting, swirling, and storiform pattern. The combination of light-microscopic, ultrastructural, and immunohistochemical features suggests that these tumors might be derived from dendritic reticulum cells.
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            Dendritic cell sarcoma: a pooled analysis including 462 cases with presentation of our case series.

            Dendritic cell tumors are extremely rare and current knowledge on these tumors is limited. The characteristics of three dendritic cell sarcoma subtypes and their optimal treatment approaches are not fully clarified. We aimed to make a systematic review of the literature and enrich the current data with five new cases. Pooled analysis of 462 reported cases revealed that the tumor had no age, gender or racial predilection. Our analysis suggests that the young age, advanced stage, intraabdominal involvement and unfavorable histological features (i.e. large tumor size, absence of lymphoplasmacytic infiltration, coagulative necrosis, high mitotic count) may predict poor prognosis. Subtypes of this tumor have different clinical behaviors with interdigitating dendritic cell sarcoma being the most aggressive form. In general, surgery is the most effective treatment modality and adjuvant radiotherapy has no significant effect on overall survival of patients. The role of chemotherapy for the management of advanced disease is controversial. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.
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              Inflammatory pseudotumor-like follicular dendritic cell tumor: a distinctive low-grade malignant intra-abdominal neoplasm with consistent Epstein-Barr virus association.

              Follicular dendritic cell (FDC) tumors are uncommon neoplasms that can involve lymph nodes or extranodal sites. They can exhibit a broad spectrum of histologic appearances and behavior, but the intra-abdominal ones usually pursue an aggressive course. The purpose of this study was to characterize a distinctive variant of FDC tumor morphologically mimicking inflammatory pseudotumor through analysis of the clinicopathologic features of 11 cases. The patients included 10 women and one man (age range, 19-61 years; median age, 40 years) who presented with abdominal discomfort or pain. Six patients had systemic symptoms such as marked weight loss, fever, or malaise. All tumors occurred in intra-abdominal sites: liver (n = 7), spleen (n = 3), and peripancreatic region (n = 1). Of the nine patients with follow-up data, six were alive and well, one developed recurrence at 9 years, and two had repeated recurrences over many years. Grossly, the tumors were usually solitary and fleshy, punctuated by areas of hemorrhage and necrosis. Histologically, in a background of abundant lymphocytes and plasma cells were dispersed spindle or ovoid cells with vesicular nuclei and distinct nucleoli. The degree of nuclear atypia was variable, and some nuclei could be grotesque or resemble Reed-Sternberg cells. Focally, spindle cell fascicles could be formed. The atypical cells were immunoreactive for FDC markers such as CD21/CD35, CD23, and CNA.42. In situ hybridization for Epstein-Barr virus (EBV)-encoded RNA was positive in all cases, remarkably highlighting the spindle cells and their atypia. EBV-latent membrane protein-1 was expressed commonly, albeit often focally and weakly. Therefore, inflammatory pseudotumor-like FDC tumor represents a distinctive variant of FDC tumor that differs from conventional FDC tumor in the following aspects: marked female predominance; selective localization in intra-abdominal sites, especially the liver and spleen; frequent presence of systemic symptoms; indolent behavior despite an intra-abdominal location; dispersed distribution of tumor cells and prominent lymphoplasmacytic infiltration; and consistent association with EBV.
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                Author and article information

                Journal
                Onco Targets Ther
                Onco Targets Ther
                OncoTargets and Therapy
                OncoTargets and therapy
                Dove Medical Press
                1178-6930
                2015
                24 July 2015
                : 8
                : 1823-1830
                Affiliations
                [1 ]Department of Oncology, Shandong Cancer Hospital & Institute, School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, Shandong Province, People’s Republic of China
                [2 ]Department of Pathology, Shandong Cancer Hospital & Institute, Jinan, Shandong Province, People’s Republic of China
                [3 ]Department of Oncology, Shandong Cancer Hospital & Institute, Jinan, Shandong Province, People’s Republic of China
                Author notes
                Correspondence: Jie Liu, Department of Oncology, Shandong Cancer Hospital, No 440 Jiyan Road, Huaiyin District, Jinan, Shandong Province 250117, People’s Republic of China, Tel +86 531 6762 6332, Fax +86 531 8798 4079, Email liujiesdch@ 123456126.com
                [*]

                These authors contributed equally to this work

                Article
                ott-8-1823
                10.2147/OTT.S86502
                4521670
                26244020
                2a3c98c6-7ca1-47b3-bf21-a99c04409859
                © 2015 Ma et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

                The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

                History
                Categories
                Case Series

                Oncology & Radiotherapy
                fdcs,bone,abdominal cavity,pelvic cavity,diagnosis,therapy
                Oncology & Radiotherapy
                fdcs, bone, abdominal cavity, pelvic cavity, diagnosis, therapy

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