title: Actinic keratosis. Early skin cancer?
mesh_terms: D000368:Aged; D006801:Humans; D007642:Keratosis / Q000209:etiology / Q000473:pathology / Q000628:therapy*; D010787:Photosensitivity Disorders / Q000209:etiology / Q000473:pathology / Q000628:therapy*; D011230:Precancerous Conditions / Q000209:etiology / Q000473:pathology / Q000628:therapy*; D012878:Skin Neoplasms / Q000209:etiology / Q000473:pathology / Q000628:therapy*