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目的：分析不同种类肿瘤颅底侵犯的ＣＴ表现。方法：３２例起源于不同组织的肿瘤（７例良性，２５例恶性）均有颅底侵犯。ＣＴ扫描使用Ｐｈｉｌｉｐｓ～ｔｏｍｏｓｃａｎ３５０型全身ＣＴ扫描机，层厚３～６ｍｍ，所有病例均有轴位扫描，１５例同时有冠、矢状位扫描。结果：颅底侵犯的部位、范围与肿瘤起源部位和性质有密切关系，３２例中２０例有颅内侵犯，ＣＴ特征为颅内外肿物相连续且密度一致，未见瘤内出血、坏死，较少发生瘤周水肿。结论：轴、冠状位ＣＴ扫描是肿瘤颅底侵犯诊断与定位的主要方法。矢状位扫描可做为诊断的辅助方法。
Objective: To analyze CT manifestations of skull base invasion in different kinds of tumors. Methods: Thirty-two tumors that originated in different tissues (7 benign and 25 malignant) had skull base invasion. CT scan using Philips ~ tomoscan350 type CT scanner, layer thickness 3 ~ 6mm, axial scanning in all cases, 15 cases of both crown and sagittal scan. Results: The location and extent of the skull base invasion were closely related to the origin and nature of the tumor. Twenty cases of 32 had intracranial invasion. The features of CT were continuous and uniform density of intracranial and extracranial masses. No hemorrhage or necrosis occurred in the tumor. Less peritumoral edema occurred. Conclusion: The axial and coronal CT scan is the main method of diagnosis and localization of the skull base tumor. Sagittal scans can be used as a diagnostic aid.