Vulvar apocrine hidradenocarcinoma arising in a hidradenoma papilliferum—A case report

Abstract

Hidradenoma papilliferum (HP) is a benign adnexal neoplasm of the vulva that typically presents as a unilateral, flesh‐colored papule in the labium majus in middle‐aged Caucasian women. It is considered to be a close counterpart of the intraductal papilloma of the breast. Malignant transformation is rare with few reports in the literature. We present a case of vulvar mammary‐type apocrine hidradenocarcinoma arising in an HP.