Basal Cell Carcinoma vs Common Nevus

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

Feature
Basal Cell Carcinoma
Common Nevus
Category
Malignant
Benign
Key feature
The most common cancer in humans. Slow-growing, rarely spreads, but can cause serious tissue damage if untreated.
Normal moles - clusters of pigment cells. Usually harmless, but monthly monitoring for changes is essential.
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
Genetic predisposition (number of moles is largely hereditary); Sun exposure during childhood and adolescence; Fair skin
Action needed
A pearly, shiny, or translucent bump - especially with tiny visible blood vessels
Any mole that changes in size, shape, or color

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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Common Nevus

A common nevus is a normal mole - a well-defined growth formed by a cluster of melanocytes (pigment-producing cells). Most adults develop between 10 and 40 common moles by their 30s, and the number gradually decreases with age as some moles naturally fade.

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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 →