Epidermoid cyst of the testis.
An epidermoid cyst of the testis is a rare benign lesion, representing about 1% of all testicular tumors. Most of the lesions occur between the age of 20 and 40 and present as a painless enlargement of the testis, or are found as a nodule on routine examination. Histopathologic findings consist of a cyst filled with keratin and lined by a squamous epithelium. There is evidence that this tumor is of germ-cell origin and represents monoepidermal differentiation of a benign teratoma. There is some discussion about treatment, but most authors perform radical orchiectomy.
D004814:Epidermal Cyst / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013733:Testicular Diseases / Q000473:pathology*