Apocrine hidrocystoma of the foreskin. A case report and review of the literature.

Apocrine hidrocystoma (AH) is an uncommon benign cystic tumor that is rarely located in the genitalia. We present the case of a 52-year-old uncircumcised man who presented an AH on his foreskin. The lesion was non-proliferative. Including the present report, only 10 cases of penile AH have been published to date. Most patients are adult (mean age 39.2 years, range 25-56 years) and only one case in one child and another case in one adolescent have been reported. The lesion involves more commonly the foreskin followed by the shaft. The average maximum diameter was 1.6 cm (range 0.3-3 cm). The majority (70%) of tumors are unilocular. The main differential diagnosis of AH includes eccrine hidrocystoma, epidermal inclusion cyst and male median raphe cyst. Complete excision of the lesion is curative.