Apocrine Hidrocystoma of Foreskin: A Rare Benign Cystic Lesion.

Apocrine hidrocystoma is a benign cystic tumour arising from apocrine sweat glands. Its occurrence on the penile foreskin is exceedingly rare, representing an uncommon lesion of the external genitalia. A review of the literature suggests that only a limited number of cases -- approximately 13 involving external genitalia -- have been reported worldwide. We present the case of a 50-year-old gentleman who was referred to the urology service with a gradually enlarging, multiloculated, non-proliferative cyst arising from the foreskin. Patient underwent excisional biopsy with complete circumcision under local anaesthesia. Histopathology examination confirmed the diagnosis of apocrine hidrocystoma. Apocrine hidrocystomas are mostly located in the head and neck region, particularly the periorbital area, external auditory meatus, and axilla, with genital involvement being exceptionally uncommon. Complete surgical excision is both diagnostic and curative with a low risk of recurrence.  Reports of apocrine hidrocystoma involving the foreskin remain scarce in the literature. To our knowledge, this represents the first reported case from Royal Shrewsbury Hospital.