Dermoid Cyst of the Penis: A Case Report of an Unusual Penile Mass.

Dermoid cysts are subcutaneous swellings that are usually congenital and originate from the sequestration of embryonic epithelium along the lines of embryonic closure. They are composed of a mixture of sebaceous fluid, keratin, cholesterol crystals, calcium, hair follicles, sweat glands, and sebaceous glands. They present as a non-tender mass that is well-circumscribed, firm in consistency, and usually asymptomatic.