Figure 3
Histologic appearance and immunohistochemical findings of the FDC. (a) Histologic appearance of the follicular dendritic cell sarcoma showing characteristic spindle and ovoid tumor cells with elongated nuclei and prominent nucleoli; note the presence of numerous lymphocytes (hematoxylin and eosin staining, original magnification ×400). (b) Immunohistochemical findings of the FDC sarcoma; note the expression of tumor cells for H-caldesmon in scattered cells (IHC staining, original magnification ×400).