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- W2005665802 abstract "The goal of this study was to characterize the clinicopathologic features of follicular dendritic cell sarcoma, a very uncommon neoplasm.The 17 cases were collected from the consultation and surgical pathology files of the authors, including 8 previously reported cases. The histologic and immunohistochemical features and outcome were analyzed.The patients had a median age of 40 years, with a slight female predominance. Seven patients presented with enlarged lymph nodes, and ten presented with tumor in extranodal sites. Two cases were associated with hyaline-vascular Castleman's disease. The tumors had an average greatest dimension of 6.7 cm. The most common histologic feature was a storiform or fascicular array of spindle, ovoid, or polygonal cells with oval nuclei, delicate nuclear membrane, vesicular or granular chromatin, distinct nucleoli, indistinct cell borders, and frequently fibrillary cytoplasm. There were often scattered multinucleated forms. The tumor cells sometimes formed sheets, circular whorls, follicle-like structures, trabeculae, or pseudovascular spaces. There was a sprinkling of small lymphocytes, with or without cuffing around blood vessels. The neoplastic cells were immunoreactive for CD21 (17 of 17 cases), CD35 (17 of 17 cases), desmoplakin (10 of 17 cases), epithelial membrane antigen (14 of 16 cases), S-100 protein (6 of 17 cases), and CD68 (2 of 17 cases), but not cytokeratin. Ultrastructural studies showed villous processes connected by desmosomes. Only one harbored the Epstein-Barr virus. Among 13 patients with a median follow-up of 3 years, local recurrence occurred in 6, metastasis in 6, and 3 died of disease.Follicular dendritic cell sarcoma exhibits distinctive histologic features that permit its presumptive recognition, but a firm diagnosis requires confirmation with special studies. Because it has a significant recurrent and metastatic potential (the latter risk having been previously underestimated), it should be viewed as an intermediate grade malignancy. An intraabdominal location is associated with a particularly aggressive clinical course." @default.
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- W2005665802 title "Follicular dendritic cell sarcoma. Clinicopathologic analysis of 17 cases suggesting a malignant potential higher than currently recognized." @default.
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