Hair-follicle nevus.
D003937:Diagnosis, Differential; D004428:Ear Neoplasms / Q000175:diagnosis; D004431:Ear, External / Q000002:abnormalities; D006197:Hair; D006801:Humans; D009506:Nevus / Q000175:diagnosis*; D012878:Skin Neoplasms / Q000175:diagnosis*; D009626:Terminology as Topic