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Skin Problems & Treatments Health Center

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Adult Skin Problems

Close-up of cutaneous horn on scalp of elderly man

Cutaneous Horns

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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 sun exposure. Read more about skin cancer.

Reviewed on September 15, 2009

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