An anomalous accessory palmaris longus muscle.
D000328:Adult; D000013:Congenital Abnormalities / Q000175:diagnosis; D003937:Diagnosis, Differential; D005542:Forearm / Q000002:abnormalities*; D006801:Humans; D008297:Male; D009132:Muscles / Q000002:abnormalities*; D009408:Nerve Compression Syndromes / Q000175:diagnosis; D010523:Peripheral Nervous System Diseases / Q000175:diagnosis*; D014459:Ulnar Nerve