Figure 6From: Extranodal Rosai-Dorfman disease involving the right atrium in a 60-year-old maleNumerous histiocytes showing strong cytoplasmic immunohistochemical staining for S-100 (A). Numerous histiocytes showing strong cytoplasmic immunohistochemical staining for CD68 (B). Immunohistochemical staining showing CD1a negativity among histiocytes (C).Back to article page