Poroid Hidradenoma Presenting as a Malignant Neoplasm

Abstract

Poroid hidradenoma is a rare adnexal neoplasm that presents with slow-growing solitary dermal or subcutaneous nodules with pink, red, or blue coloration. Malignant transformation has been reported in about 1%; however, clinical and histologic characteristics may present similarly with malignant neoplasms. A 60-year-old, Filipino, female presented with a 1-month history of a solitary, brownish-black papule on the right cheek progressing to a translucent friable nodule with associated bleeding after minimal trauma. The patient was initially assessed as a case of basal cell carcinoma due to its rapid growth. Hence, the patient was referred to a dermatologic surgeon for biopsy. Poroid hidradenoma was confirmed histologically and was managed with local excision. Poroid hidradenoma presenting with rapid growth is a very rare occurrence.