Objective:Because of the complexity of anatomical relationship, insufficient operative space,and adjacent to vital center, it is difficult to deal with the tumor located in fourth ventricle and dorsal brain stem.
目的:第四脑室及脑干背侧的肿瘤由于解剖关系复杂、操作空间小、毗邻生命中枢,手术十分困难。
参考来源 - 小脑延髓裂入路显微解剖学研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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