目的探讨CT、MRI影像学在颅底 咽旁间隙肿瘤早期诊断及鉴别中的应用效 果。方法 本研究回顾性分析我院2015年 1月-2017年1月收治的48例颅底咽旁间隙 肿瘤患者临床资料，所有患者均接受CT、 MRI影像学诊断。结果 CT诊断早期颅底 咽旁间隙肿瘤病理准确性分别为神经鞘 瘤82.35%、腮腺深叶多形性胰瘤77.78%、 神经纤维瘤61.11%、腮裂囊肿25.00%、 颈动脉瘤50.00%、血管瘤50.00%。MRI诊 断早期颅底咽旁间隙肿瘤病理准确性分 别为神经鞘瘤94.12%、腮腺深叶多形性 胰瘤88.87%、神经纤维瘤91.67%、腮裂 囊肿100.00%、颈动脉瘤75.00%、血管瘤 66.67%。CT影像神经鞘瘤变图像为圆形， 边界光滑，包膜完整，颈动脉瘤累及静脉 孔。MRI显示腮腺深叶多形性胰瘤同侧咽 旁间隙生长。神经纤维瘤与腮腺深叶分界 较清晰。强化扫描结果发现，T2加权为不 均性高信号，T1WI椭圆形肿物多呈低信 号。结论 CT、MR均能诊断早期颅底咽旁 间隙肿瘤，两者影像学各具特点，联合诊 断能鉴别早期颅底咽旁间隙肿瘤病理，推 荐使用。

Objective To investigate application effect of CT and MRI in early diagnosis and differentiation of tumor adjacent to the skull space. Methods In this study, the clinical data of 48 patients with tumor adjacent to the skull space in our hospital from January 2015 to January 2017 were retrospectively analyzed, all patients received CT and MRI examinations. Results The pathological diagnostic accuracy of CT in neurilemmoma, deep-lobe parotid tumors, neurofibroma, parotid cyst, carotid aneurysm, and hemangioma were 82.35%, 77.78%, 61.11%, 25.00%, 50.00%, and 50.00% respectively. And those of the MRI examinations were 94.12%, 88.87%, 91.67%, 100.00%, 75.00% and 66.67% respectively. The CT images of schwannoma showed round or oval with smooth boundary and complete capsule, while the carotid aneurysm featured an involvement of the jugular foramen. MRI examination showed that the deep-lobe parotid tumors compressed parapharyngeal space in shift, the neurofibroma had clear boundaries with deep-lobe parotid tumors. The enhanced scan results found uneven high signal in T2WI and oval signal with low density in T1WI. Conclusion Both CT and MRI can diagnose the tumor adjacent to the skull space with its own image features, while the combination of the two examinations can differentiate the pathology characteristics of the disease, which is recommended.