“…The characteristic histopathologic feature is emperipolesis Figure 1, in which histiocytes, phagocyte, lymphocytes, plasma cells, erythrocytes, or polymorphonuclear leukocytes are intact, this is more appropriate [2–6]. Immunohistochemical analysis consistently shows S-100 protein positivity, particularly with the monoclonal antibody and immunoreactivity against α -1-antichymotrypsin, CD68, EMA, and MAC387 antibodies [2–7]. The characteristic immunohistochemistry features are positive S-100 protein, Ki67 5%, CD79 α , and LCA with negative CD1 α , CK, EMA and GFAP shows in Table 1.…”