Objective : To provide anatomical basis for petrous pyramid through petrous presigmoid approach.

目的: 为经颞骨岩部乙状窦前入路颞骨岩部的磨除提供解剖依据.

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Objective To describe and discuss a transpetrosal presigmoid approach for removal of tumors in clival regions.

目的介绍并讨论一种治疗斜坡区肿瘤的经岩骨后乙状窦前的手术入路.

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