在对一具老年女尸行层次解剖时，发现其左侧上肢桡神经浅支缺如，被前臂外侧皮神经替代，兼有副拇长屈肌；且有先天性巨乙状结肠。集诸多变异畸形于一身，实属罕见。1．桡神经浅支缺如左侧上肢桡神经于肱骨外上髁后上方穿臂外侧肌间隔进入肘窝，走行于肱肌与肱桡肌之间的沟中， In an elderly female corpse level anatomy, found that the left upper limb radial nerve superficial missing, replaced by forearm lateral cutaneous nerve, both vice length flexors; and a congenital giant sigmoid colon. Set a variety of abnormalities in one, it is rare. 1. Superficial branch of the radial nerve, such as the left upper limb radial nerve in the supracondylar humerus above the lateral arm to wear through the lateral intercostal space into the elbow fossa, walking in the ditch between the brachialis and brachioradialis muscle,