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a premalignant warty lesion occurring on the sun-exposed skin of the face or hands in aged light-skinned persons; hyperkeratosis may form a cutaneous horn, and squamous cell carcinoma of low-grade malignancy may develop in a small proportion of untreated patients.
keratosis senilis, keratotic
An inaccurate synonym for actinic keratosis, which is caused by accumulated ultraviolet light exposure, not by aging.
See also: keratosis