Eccrine porocarcinoma of the external ear

Abstract

Eccrine porocarcinoma (EP) is believed to arise from the intraepithelial portion of the eccrine sweat glands. The incidence rate of EP is reported to be 18 per 450,000 biopsies. Most of the diagnosed cases involve the lower extremities; a case of EP involving the ear is rare. We describe the clinical, radiologic, and histopathologic features of EP in an 11-year-old boy. © 2011, Vendome Group, LLC.