Porocarcinoma in a palm reconstructed with a full thickness skin graft: A case report

Figure 4 Histological features of porocarcinoma. A: Epidermal tumor cluster arising from the intraepidermal portion of the sweat gland ducts and extending to the dermal portion (arrow); B: The tumor cells exhibit atypical mitosis (arrow); C-F: Tumor cells are positive for epithelial membrane antigen (C), cytokeratin 7 (D), focal expression for S-100 (E) on scattered melanocytes (arrows), and C-kit (F). A and B: Hematoxylin and eosin; C-F: Immunohistochemical staining of porocarcinoma. Original magnification: A (× 20); B (× 400); C-E (× 40); F (× 100).