病例介绍患者，男，５５岁，因头痛２个月，进行性加重伴呕吐２ｄ就诊。查体：生命体征正常，发育营养良好，神清。全身浅表淋巴结未触及肿大，头颅五官、心、肺、腹均无异常。右侧肢体肌力Ⅲ级，左侧正常。胸片、心电图、腹部Ｂ超及各项化验结果正常。查眼底：双侧视乳头... Case description Patients, male, 55 years old, 2 months due to headache, progressive exacerbations with vomiting 2d treatment. Physical examination: vital signs normal, well-developed nutrition, clear gods. Systemic superficial lymph nodes did not touch the enlargement, facial features, heart, lung, abdomen were normal. Right limb muscle Ⅲ grade, left normal. Chest radiograph, electrocardiogram, abdominal B ultrasound and the test results were normal. Check the fundus: bilateral optic ...