Figure 2.

Representative photomicrographs of the histopathology and immunohistochemistry of the scalp tumor showing features consistent with a diagnosis of eccrine porocarcinoma. (A) Photomicrograph of the histopathology shows large, pleomorphic, round and oval cells, arranged in groups and lobules, infiltrating the dermal tissue. Hematoxylin and eosin (H&E). (B) Photomicrograph of the immunohistochemistry (brown) shows malignant cells that are strongly positive for cytokeratin (AE1/AE3). (C) Photomicrograph of the histopathology shows tumor nests in the dermis. Malignant cells are also seen within dilated lymphatics. Hematoxylin and eosin (H&E).