Results :located in the cerebellopontine angle and saddle area were more.

结果：病灶多位于鞍区和后颅窝的桥小脑角区。

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Objective: Provide image anatomy basis of the ultimate ethmoid sinus for the surgical approach via saddle area.

目的：为临床开展鞍区手术提供一组最后筛房的影像解剖资料。

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Objective: To find out the influence of development of the posterior ethmoid sinus on surgical approach via saddle area.

目的：为了了解后筛窦气化发育对前颅底外科及蝶鞍区手术的影响及术前指导意义。

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