后颅窝肿瘤是指生长在小脑幕下包括小脑、脑干、四脑室的脑内肿瘤及桥脑小脑角、斜坡上的脑外肿瘤。我院自 1 993年 5月至 1 999年 1 2月共收治41例后颅窝肿瘤、占同期颅内肿瘤的 32 .2 %。现总结如下。1　临床资料1 .1　一般资料 :本组 41例 ,男 2 8例 ,女 1 3例。年龄 6至 63 Posterior fossa tumors refer to the growth of cerebellar tentorium, including cerebellum, brain stem, brain brain tumors and pons cerebellar pons, cerebellar slopes on the tumor. In our hospital from May 1993 to January 1999, a total of 41 cases of posterior fossa tumors were treated, accounting for 32.2% of intracranial tumors in the same period. Now summarized as follows. 1 Clinical data 1.1 General information: The group of 41 patients, 28 males and 13 females. Ages 6 to 63