Cutaneous metastasis of ovarian carcinoma with shadow cells mimicking a primary pilomatrical neoplasm.

Shadow cells are characteristic of pilomatricoma, although they have been described in other cutaneous and visceral neoplasms, particularly endometrioid adenocarcinomas of the female genital tract. We describe a metastasis of an ovarian endometrioid adenocarcinoma with shadow cells to the skin that was initially misinterpreted as a pilomatricoma. We compare the histology of the ovarian neoplasm to 21 pilomatricomas. This is the first reported case of a cutaneous metastasis of a visceral neoplasm mimicking a primary pilomatrical neoplasm.