title: Light therapy for precancerous skin lesions.
mesh_terms: D006801:Humans; D007642:Keratosis / Q000188:drug therapy*; D010778:Photochemotherapy; D010787:Photosensitivity Disorders / Q000188:drug therapy; D011230:Precancerous Conditions / Q000188:drug therapy*; D012878:Skin Neoplasms / Q000188:drug therapy*