海绵窦肿瘤的CT和MRI表现

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.

CT and MRI Features of Cavernous Sinus Tumors

Objective] 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 involvement of internal carotid artery and parasellar structure are the main CT and MRI characteristics of CS tumors.