| Health / Medical Topics |
Actinic (Solar) Keratosis
Definition 1
A precancerous lesion of the skin composed of atypical keratinocytes. It is characterized by the presence of thick, scaly patches of skin. Several histologic variants have been described, including atrophic, acantholytic, and hyperkeratotic variants. (NCI Thesaurus)
Definition 2
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. (NCI Dictionary)
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