Keratosis

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Notion

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Science and technology

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What Wikipedia says

Keratosis (from kerat- + -osis) is a growth of keratin on the skin or on mucous membranes stemming from keratinocytes, the prominent cell type in the epidermis. Most are not serious but actinic keratosis (also known as solar keratosis) and chronic scar keratosis, are precancerous conditions.

Excerpt from the Wikipedia article “Keratosis”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Irja from San Francisco, CC BY-SA 2.0, via Wikimedia Commons.