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NCI Dictionary of Cancer Terms

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NCI Dictionary of Cancer Terms



actinic keratosis  listen  (ak-TIH-nik KAYR-uh-TOH-sis)

  A thick, scaly patch of skin that may become cancer. It usually forms on areas exposed to the sun, such as the face, scalp, back of the hands, or chest. It is most common in people with fair skin. Also called senile keratosis and solar keratosis.