Figure 4.
A. Round to oval-shaped tumor cells, nests of epithelioid cells with moderate amount of eosinophilic to clear cytoplasm (hematoxylin–eosin staining ×200). (B) Neoplasmatic cells with positive expression of HMB-45 (Human Melanoma Black-45 staining ×100). HMB-45 = human melanoma black-45.