1病例报告病例1,患者女,27岁。2005年或头晕、恶心和呕吐1个月,发现小脑占位病变,考虑髓母细胞瘤。于2005-10初入我院神经外科,于2005-10-25行颅后窝开颅小脑髓母细胞瘤切除术、脑室腹腔分流术,手术后症状好转,术后病理示髓母细胞瘤(图1A)。术后行头部伽玛刀治疗。此后病情平稳。2008-07无明显诱因出现腰部乏力,进而出现右腿乏力进行性加重,复 1 Case Report Case 1, female patient, 27 years old. 2005 or dizziness, nausea and vomiting for 1 month, found cerebellar lesions, consider medulloblastoma. In 2005-10 early into our hospital neurosurgery, in 2005-10-25 cranial fossa cranial skull cerebellar medulloblastoma resection, peritoneal shunt, postoperative symptoms improved, postoperative pathology showed medulloblastoma ( Figure 1A). After surgery head gamma knife treatment. After a stable condition. 2008-07 There was no obvious incentive to appear waist weakness, and then there is progressive weakness of the right leg, complex