对２８例经手术及病理证实的成人髓母细胞瘤进行回顾性研究。所选病例年龄大于１８岁，以颅内压增高及小脑损害为主要临床表现，ＣＴ及ＭＲ为主要诊断手段，肿瘤位于后颅中线部位者１５例，小脑半球７例，桥小脑角２例，幕上３例，幕上幕下多发部位１例。强调手术尽可能切除肿瘤加术后早期足量放疗是提高疗效的关键。 A retrospective study of 28 adult medulloblastomas confirmed by surgery and pathology was performed. The age of the selected case was more than 18 years old. The main clinical manifestations were increased intracranial pressure and cerebellar damage. CT and MR were the main diagnostic methods. The tumor was located in the posterior middle cranial area in 15 cases, cerebellar hemisphere in 7 cases, and cerebellopontine angle in 2 cases. There were 3 cases on the screen, 1 case with multiple sites under the curtain. Emphasis on surgical resection of the tumor as much as possible plus early postoperative radiotherapy is the key to improving efficacy.