脑膜瘤的CT诊断

目的：提高脑膜瘤CT诊断的准确性。方法：回顾分析42例经手术病理证实为脑膜瘤患者的CT表现。肿瘤位于大脑镰旁10例，大脑凸面12例，矢状窦旁8例，蝶骨嵴7例，嗅沟4例，桥小脑角1例。结果：增强后多为均匀增强。边界清晰，呈圆形或椭圆形。不典型CT表现为肿瘤混杂有低密度区，且无明显强化，或呈环形强化或有壁结节的强化。结论：脑膜瘤的CT表现具有特征性，而且临床表现与CT某些征象有关。临床症状的轻重与瘤周水肿的程度有相关性。

CT diagnosis of meningioma

Objective:To improve the CT diagnostic accuracy of meningioma.Methods:CT findings of 42 cases of meningioma proved by operation and pathology were analyzed retrospectively.The tumors were located at falx regin (n=10),cerebral convexity (n=12),parasagittal sinus (n=8),sphenoid ridge (n=7),olfactory sulcus (n=4),and cerebellopintine angle (n=1).Results: Meningioma was frequently homogeneously enhanced,round or oval in shape,and had well defined margin.Atypical CT findings of meningioma appeared as lower density within a heterogeneous lesion,without enhancement or with ringlike or nodular enhancement.Conclusion: Meningioma has characteristic CT features,while its clinical manifestation is correlated with CT findings and the degree of peritumoral edema .