Some of the patients haddysesthesia but with no pathological reflex, symptoms of the pyramidal tract ofthe medulla or hyperreflexia of the tendon reflex on the neurological examination.

• 所有患者均表现为单侧肩部无力，以外展为主，严重者有肌肉萎缩，肩部、肩胛区至前臂有放射性疼痛，部分有感觉迟钝；