A case of eccrine porocarcinoma on the scalp

Eccrine porocarcinoma is a very rare, locally-aggressive, potentially fatal tumor arising from the intraepidermal ductal portion of the eccrine sweat gland. It develops either spontaneously or from a long standing benign eccrine poroma. It usually affects older people and is located most commonly on the lower extremities. We report a case of eccrine porocarcinoma which developed on the scalp of an 82-year-old woman. There was no evidence of metastasis, and the tumor was successfully removed by Mohs micrographic surgery.