Picture of Cutaneous Horns
A cutaneous horn is a scaly conical-shaped growth that is made of keratin, the protein that comprises nails. The base of the growth is often reddish. Cutaneous horns come in a variety of shapes and sizes. Most growths are just a few millimeters in length. These growths occur most often in older, fair-skinned individuals who have a history of major sun exposure. Squamous cell carcinoma may be found at the base of the lesion.
Text Reference: World Journal of Surgical Oncology, vol. 2, 2004: “Cutaneous horns: are these lesions as innocent as they seem to be?”