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Figure 2: (a) Pleomorphic tumor cells with abundant cytoplasm, large vesicular nuclei, prominent nucleoli and frequent mitosis. H and E (×400), (b) Strongly positive immunohistochemical staining of neoplastic cells with S-100 (×100), (c) Strongly positive immunohistochemical staining of neoplastic cells with HMB-45 (×100), (d) Strongly positive immunohistochemical staining of neoplastic cells with Melan-A (×100)

Figure 2: (a) Pleomorphic tumor cells with abundant cytoplasm, large vesicular nuclei, prominent nucleoli and frequent mitosis. H and E (×400), (b) Strongly positive immunohistochemical staining of neoplastic cells with S-100 (×100), (c) Strongly positive immunohistochemical staining of neoplastic cells with HMB-45
(×100), (d) Strongly positive immunohistochemical staining of neoplastic cells with Melan-A (×100)