A large cutaneous horn of the glans penis: a rare presentation.

Cutaneous horn (cornu cutaneum) is a relatively uncommon lesion consisting of a projectile, conical, dense, hyperkeratotic nodule which resembles the horn of an animal. Cutaneous horns most frequently occur in sun-exposed parts and are typically found in the face and the scalp, but may also occur on the hands, eyelids, nose, chest, neck, shoulder and penis. Their occurrence on the penis is uncommon. We report a 42-year-old man presenting with penile cutaneous horn. The association with malignancy on the penis makes proper identification of these lesions essential. Standard treatment involves local excision, but the presence of malignancy mandates a partial penectomy.