He was circumcised four years previously, and shortly after the wound healed there appeared a small wart, followed by a horn about the size of a marble.

Jewett speaks of a penile horn 3 1/2 inches long and 3 3/4 inches in diameter; Pick mentions one 2 1/2 inches long.

There is an account of a Russian peasant boy who had a horn on his penis from his earliest childhood.

Johnson mentions a case of a horn from the scrotum, which was of sebaceous origin and was subsequently supplanted by an epithelioma.
Ash reported the case of a girl named Annie Jackson, living in Waterford, Ireland, who had horny excrescences from her joints, arms, axillae, nipples, ears, and forehead.

Locke speaks of a boy at the Hopital de la Charite in Paris, who had horny excrescences four inches long and 11 inches in circumference growing from his fingers and toes.
Wagstaffe presents a horn which grew from the middle of the leg six inches below the knee in a woman of eighty.