海绵窦肿瘤的CT和MRI表现

CT and MRI Features of Cavernous Sinus Tumors

【目的】探讨海绵窦肿瘤的CT和MRI特征。【方法】回顾分析89例经病理证实的海绵窦肿瘤的CT和MRI资料,包括垂体瘤25例、鼻咽鼻窦肿瘤29例、鞍旁脑膜瘤14例、鞍旁胆脂瘤3例、三叉神经鞘瘤6例、海绵窦转移瘤4例、鞍区脊索瘤5例、鞍旁软骨肉瘤2例和鞍旁骨软骨瘤1例。【结果】双侧海绵窦受累26例,单侧受累63例。肿瘤表现为病变侧海绵窦扩大和外缘膨隆(89例)、海绵窦CT密度异常并不同程度强化(62例)、海绵窦MR信号异常并不同程度强化(68例)、颈内动脉受累(76例)和颅底骨质破坏(47例)。【结论】海绵窦肿瘤主要表现为海绵窦形态、密度或信号异常、颈内动脉及邻近结构受侵。

To investigate the CT and MRI features of the cavernous sinus （CS） tumors. [Methods] CT and MRI data of 89 cases with pathologically proved CS tumors were analyzed. The neoplasms included pituitary adenoma（ n = 25）, tumors derived from nasopharynx or nasal sinuses （ n = 29）, parasellar meningioma（ n = 14）, parasellar cholesteatoma（ n = 3）, trigeminal schwannoma（ n = 6）, sellar chordoma（ n = 5）, hematogenous metastases（ n =4）, parasellar chondrosarcoma（ n =2）, parasellar osteochondroma（ n = 1）. [Results] The CS neoplasms were consisted of 20 primary and 69 secondary tumors. The lesions invaded bilateral （ n = 26） or unilateral（ n =63） CS. The CT and MRI features included asymmetric enlargement and bulging lateral wall of the CS （ n =89） ,abnormal density and enhancement of CS on CT scan（ n =62） ,abnormal signal and enhancement of CS on MRI （ n = 68）, involvement of internal carotid artery （ n = 76）and bone destruction of skull base （ n =47）. [Conclusion] Abnormality of shape, signal and density as well as involve-ment of internal carotid artery and parasellar structure are the main CT and MRI characteristics of CS tumors.