侧鞍（偏鞍）的产生源于欧洲社会对贵族女性骑马姿势的认识。欧洲传统社会，贵妇都是穿着长裙的，并且骑马的时候分腿骑马对女性来说，实为不雅。为了表现贵族淑女形象就出现了女士侧骑和侧骑鞍并成为公主礼仪必须学习的内容之一。
目的探讨一种改良双侧额下入路切除巨大鞍区肿瘤的可行性。
Objective To discuss the practicability of a modified bilateral subfrontal approach in the resection of giant sellar tumors.
方法：对45例不同胚(胎)龄时期的鞍旁结构行组织学连续切片，观察鞍侧腔壁结构及其内容物的形态学变化过程。
Methods: Serial histological sections of 45 human embryos and fetus were performed to observe the development and organization of the contents of the compartment.
结果通过对高血压性脑出血、慢性硬膜下积液病人的鞍区显微手术实践，基本掌握了侧裂分离技术和鞍区的解剖知识。
Results The knowledge of the microanatomy in sellar region and the separated techniques of sylvian cistern were basically understood by studying microscopically in the cases.
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