Eccrine porocarcinoma: a report of 2 cases and review of the literature.

Eccrine porocarcinoma (EPC), or malignant eccrine poroma, is an uncommon malignant tumor presumably arising from the intraepidermal ductal portion of the sweat glands. The variable clinical appearance of EPC lesions can make diagnosis challenging for physicians and could delay appropriate treatment. We report 2 cases of EPC and review the salient features of this uncom- mon malignancy.