Cutaneous Horn vs Squamous Cell Carcinoma

How to tell the difference — key features compared side by side.

Feature
Cutaneous Horn
Squamous Cell Carcinoma
Category
Pre-cancerous
Malignant
Key feature
Hard cone-shaped keratin projection. The horn is harmless - but 16% hide cancer at the base.
Second most common skin cancer. More aggressive than BCC - can spread to lymph nodes if not treated early.
Risk factors
Chronic sun exposure; Fair skin; Age over 60
Cumulative lifetime sun exposure (more important than acute burns for SCC); Fair skin (Fitzpatrick types I-III); History of actinic keratosis - the primary precursor lesion
Action needed
Any hard horn-like projection from the skin
A firm, red nodule on sun-exposed skin that persists or grows

Cutaneous Horn

A cutaneous horn is a hard, conical keratin projection from the skin surface. It can range from millimeters to several centimeters. The horn itself is just keratin - the critical question is what lies at the base.

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Squamous Cell Carcinoma

Squamous cell carcinoma (SCC) of the skin develops in the flat squamous cells that form the outer layer of the epidermis. It is the second most common skin cancer after BCC, with over one million cases diagnosed annually in the US.

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Does yours look more like cutaneous horn?

Quick self-check

Does this look like cutaneous horn? Answer 2 questions.

Is there a hard horn-like projection sticking up from the skin?

Is it on a sun-exposed area like face or ears?

Still not sure?

Our full ABCDE checker evaluates 5 clinical criteria dermatologists use.

Full ABCDE check →