The venous outflow of tumors were mainly drained into superior petrosal sinus by great anterior cerebellar vein and petrosal vein; 小脑大前静脉是肿瘤的引流静脉,主要经岩静脉回流至岩上窦;
The statistical analysis show there was significant difference of the incidence of cerebellar hemorrhage between petrosal vein retention group and without retain group. 统计分析显示岩静脉保留组和未保留组的小脑出血发生率有显著性差异。