1病案资料 患者女性， 45岁。因右手尺侧麻木 2个月，右拇指麻木 1周来诊。既往健康，右利。近日时有写字困难，持筷不灵活。无头痛、呕吐等高颅压症状。查体：神清语明，颅神经正常，视乳头界清。右手大、小鱼际肌、骨间肌无萎缩，无明显痛温感觉障碍，右前臂尺侧痛、触觉减退 1 case information patient female, 45 years old. Due to the right ulnar numbness 2 months, right thumb numbness 1 week diagnosis. Past health, right-wing. Recently there are difficulties in writing, holding chopsticks inflexible. No headache, vomiting and other symptoms of high intracranial pressure. Physical examination: clear statement, normal cranial nerves, clear nipple. Right hand large, small atresia muscle, no atrophy of interosseous muscle, no obvious pain temperature sensory disturbance, right forearm ulnar pain, haptic