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Dermatopathology

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Follicular Dendritic Cell Sarcoma

This is a case of a follicular dendritic cell sarcoma. This rare tumor recapitulates the morphology and immunophenotypic profile of normal follicular dendritic cells. Up to 20% of cases are associated with Castleman's disease.

Immunohistochemical studies are essential for making the diagnosis. Tumor cells are positive for CD21, CD23, CD35 , clusterin, HLA-DR, fascin, EGFR, and vimentin. Ki-67 can be positive in up to 25% of tumor cells.

Weill Cornell Medicine Dermatopathology 1300 York Avenue
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New York, NY 10065 Phone: (212) 746-6434