The cutaneous horn appears as a funnel-shaped growth that extends from a red
base on the skin. It is composed of compacted keratin (the same protein in
nails). The size and shape of the growth can vary considerably, but most are a
few millimeters in length. Squamous cell carcinoma is often found at the base.
It usually occurs in fair-skinned elderly adults with a history of significant
Read more about skin cancer.