Actinic keratosis

（重定向自Solar Keratosis）

Close-up view of an actinic keratosis lesion

Hyperkeratotic actinic keratosis on lip (

Actinic keratoses on the forehead of a balding male

Actinic keratosis (also called "solar keratosis" and "senile keratosis"; abbreviated as "AK") is a pre-cancerous patch of thick, scaly, or crusty skin. These growths are more common in fair-skinned people and those who are frequently in the sun. They usually form when skin gets damaged by ultraviolet (UV) radiation from the sun or indoor tanning beds. AKs are considered potentially pre-cancerous; left untreated, they may turn into a type of cancer called squamous cell carcinoma. Untreated lesions have up to a 20% risk of progression to squamous cell carcinoma, so treatment by a dermatologist is recommended.

单词	Solar Keratosis
释义	Solar Keratosis 英语百科 Actinic keratosis （重定向自Solar Keratosis） Actinic keratosis (also called "solar keratosis" and "senile keratosis"; abbreviated as "AK") is a pre-cancerous patch of thick, scaly, or crusty skin. These growths are more common in fair-skinned people and those who are frequently in the sun. They usually form when skin gets damaged by ultraviolet (UV) radiation from the sun or indoor tanning beds. AKs are considered potentially pre-cancerous; left untreated, they may turn into a type of cancer called squamous cell carcinoma. Untreated lesions have up to a 20% risk of progression to squamous cell carcinoma, so treatment by a dermatologist is recommended.
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