目的　探讨鼻咽癌颅内侵犯的CT表现特点。方法　搜集经病理确诊为鼻咽癌并伴有颅内占位的CT资料 40例。采用SOMATOMPLUS全身CT扫描机行鼻咽部及颅脑检查 ,38例行轴位扫描 ,层厚层距均为 5mm ,2例冠扫 ,层厚层距均为 3mm ,其中 13例进行了增强扫描。结果　 (1)鼻咽癌原发病灶 :40例 ;(2 )中颅窝病变 :海绵窦不对称 ,患侧增宽 36例 ;蝶鞍破坏 11例 ;颞极占位 5例 ;(3)后颅窝病变 :桥脑小脑角区占位病变 10例 ;(4)前颅窝病变 :1例 ;(5 )颅底骨质破坏 :33例 ,其中以破裂孔及卵圆孔破坏、吸收扩大最常见 ,分别为 30例和 2 3例。结论　CT可精确显示鼻咽癌颅内侵犯的部位、途径及范围 ,有助于临床分期及指导放疗野的设置。 Objective To investigate the CT features of intranasal invasion of nasopharyngeal carcinoma. Methods Forty cases of pathologically diagnosed nasopharyngeal carcinoma accompanied with intracranial space occupying CT data were collected. Using SOMATOMPLUS whole body CT scanner nasopharynx and craniocerebral examination, 38 cases of axial scanning, layer thickness layer spacing are 5mm, 2 cases of crown scan, layer thickness layer spacing are 3mm, of which 13 cases were enhanced scan . Results: (1) Primary lesions of nasopharyngeal carcinoma: 40 cases; (2) Middle cranial fossa lesions: asymmetric cavernous sinus, ipsilateral widening in 36 cases; sella caudal rupture in 11 cases; temporal pole occupying in 5 cases; Posterior fossa lesions: pontine cerebellar angle occupying lesions in 10 cases; (4) anterior cranial fossa lesions: 1 case; (5) skull base bone destruction: 33 cases, of which ruptured holes and foramen ovale damage, absorption The most common expansion, respectively, 30 cases and 23 cases. Conclusion CT can accurately show the parts, ways and scope of intracranial invasion of nasopharyngeal carcinoma, and contribute to the setting of clinical staging and guiding radiotherapy field.