Skin tumors: malignant and premalignant.
D000368:Aged; D002280:Basal Cell Carcinoma / Q000175:diagnosis; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis; D003937:Diagnosis, Differential; D006391:Hemangioma / Q000175:diagnosis; D006801:Humans; D008545:Melanoma / Q000175:diagnosis; D009508:Nevus, Pigmented / Q000175:diagnosis; D011230:Precancerous Conditions / Q000175:diagnosis*; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000556:secondary