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ACTINIC KERATOSIS (AK)

Definition A common intraepidermal neoplasm of sun-damaged skin characterized by variable atypia of keratinocytes.

Synonyms Solar keratosis

Weedon D, Marks R, Kao GF, Harwood CA. Keratinocytic tumours. In: LeBoit PE, Burg G, Weedon D, Sarasain A, editors . World Health Organization Classification of Tumours . Pathology and Genetics of Skin Tumours. Lyon: IARC Press; 2006. p. 10-47.