Basal Cell Carcinoma vs Seborrheic Keratosis

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

Feature
Basal Cell Carcinoma
Seborrheic Keratosis
Category
Malignant
Benign
Key feature
The most common cancer in humans. Slow-growing, rarely spreads, but can cause serious tissue damage if untreated.
Waxy, stuck-on growths - the most common benign tumor in adults over 50. Harmless but frequently mistaken for melanoma.
Risk factors
Chronic cumulative sun exposure over many years (outdoor workers, sun-seekers); Fair skin, light hair, light eye color (Fitzpatrick types I-III); Age over 50, though increasingly diagnosed in younger adults
Age over 50 (prevalence approaches 100% in elderly); Genetic predisposition (strong familial tendency); Sun exposure may play a role in some cases
Action needed
A pearly, shiny, or translucent bump - especially with tiny visible blood vessels
Only if you are unsure whether a growth is SK or melanoma

Basal Cell Carcinoma

Basal cell carcinoma (BCC) is the single most common form of cancer worldwide, with an estimated 3.6 million cases diagnosed annually in the United States alone. It arises from basal cells in the deepest layer of the epidermis.

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Seborrheic Keratosis

Seborrheic keratosis (SK) is the single most common benign skin tumor, affecting nearly all adults over 60. They appear as waxy, raised, brown or tan growths that look as though they have been pasted or stuck onto the skin surface.

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Does yours look more like basal cell carcinoma?

Quick self-check

Does this look like basal cell carcinoma? Answer 2 questions.

Does the spot appear pearly, translucent, or have tiny visible blood vessels?

Does it bleed, crust over, seem to heal, and then come back?

Still not sure?

Our full ABCDE checker evaluates 5 clinical criteria dermatologists use.

Full ABCDE check →