Pigmented skin tumors.
D002280:Basal Cell Carcinoma / Q000175:diagnosis; D003937:Diagnosis, Differential; D018219:Histiocytoma, Benign Fibrous / Q000175:diagnosis; D006801:Humans; D008545:Melanoma / Q000175:diagnosis*; D009508:Nevus, Pigmented / Q000175:diagnosis*; D011230:Precancerous Conditions / Q000175:diagnosis; D012878:Skin Neoplasms / Q000175:diagnosis*