Sarcoma de células dendríticas foliculares de localización ganglionar y extraganglionar. Estudio clinicopatoló gico e inmunohistoquímico de cinco casos
Journal
Cirugía y Cirujanos
Publisher
Academia Mexicana de Cirugía
Date Issued
2008
Author(s)
Jorge-Buys, Diego Leonardo
Lastra-Camacho, Gustavo
Campos-Martínez, Jesús
Romero-Guadarrama, Mónica
Type
Resource Types::text::journal::journal article
Abstract
Dendritic cells (DC) are an essential component of the nonlymphoid, nonphagocytic immunoaccessory reticulum cells of the peripheral lymphoid tissue. Follicular dendritic cells (FDC) are one type of DC in the lymphoid follicle associated with B lymphocytes. They play an important role in the capture and presentation of antigens, generation and regulation of immune complexes. FDC can be recognized histologically by their oval to triangular nucleus, delicate basophilic nuclear membrane, almost empty nucleoplasm, small but distinct central nucleolus, and indistinct cellular outline; some cells can be binucleated or multinucleated. Ultrastructurally, they possess delicate interwoven cell processes connected by desmosomes. Immunohistochemically, they can be highlighted by staining with CD21, CD35, R4/23, Ki-M4, CNA-42 and CD68 (Kp1). FDC sarcoma is rare. FDC sarcomas affected predominantly lymph nodes with occasional extranodal involvement. Many cases of FDC sarcomas are probably misdiagnosed as other tumors such as large cell lymphoma, sarcomatoid carcinomas, fusocellular sarcomas or melanomas. We present herein five cases of FDC sarcomas and discuss the salient clinical, pathological and immunohistochemical features of these tumors. © Cirugía y Cirujanos