结果实验所收集的数据表明在定位横窦下缘和窦汇时，上项线及枕外隆凸尖不是一个可靠的浅表解剖学标志。
Results The data of this study showed that the superior nuchal line and inion is not always a reliable external anatomical mark to locate the transverse sinus and torcular herophili.
上矢状窦中段接受额后静脉、中央前静脉、中央静脉、中央后静脉和顶前静脉； 上矢状窦后段接受顶后静脉和枕静脉。
The posterior frontal vein, precentral vein, central vein, postcentral vein and anterior parietal vein join the middle segment of superior sagittal sinus.
结论枕下乙状窦后经内听道入路的听神经显微手术，能够取得较好的肿瘤全切除率和面听神经功能保留率。
Conclusion Undergoing retrosigmoid approach one can succeed to get hign rate of total acoustic neuroma removal, facial and hearing preservation.
结论枕下乙状窦后经内听道入路的听神经显微手术，能够取得较好的肿瘤全切除率和面听神经功能保留率。
Conclusion Undergoing retrosigmoid approach one can succeed to get hign rate of total acoustic neuroma removal, facial and hearing preservation.
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