Clear Cell Hidradenoma of the Inguinal Area: A Rare Tumor in an Uncommon Location

Abstract

Nodular hidradenomas are benign sweat gland-derived tumors that can produce clinical and dermatoscopic misdiagnoses. Histologically, these tumors can be classified into eccrine and apocrine subtypes. Clear cell hidradenoma is a rare benign eccrine tumor, it’s representing 1% of all skin tumors, found mainly in adult females. The lesions are usually solitary and are most likely to be found on the scalp, face or anterior trunk. We report a case of clear cell hidradenoma developing in the inguinal area in a 68-year old man, which occurred during the course of nine months. The clinical and histologic findings of the tumor are documented. The lesion was totally removed by excision and revealed no evidence of recurrence. Through this case, we would like to highlight the unusual location of this hidradenoma.