脑膜瘤的CT定性准确率很高,一般为90～95％。但有些脑膜瘤,由于形态学和组织学的改变,可呈非典型的CT表现,诊断困难,常被误诊为其它类型的颅内肿瘤。 我科自1980年8月～1984年7月收治经手术和病理证实的颅内良性脑膜瘤157例,其中具有典型的CT表现者144例(91.7％),术前均做出正确诊断。余13例CT扫描呈非典型表现,现报告如下。 Mesentery of the CT qualitative high accuracy, usually 90 to 95%. However, some meningiomas, due to morphological and histological changes, can be atypical CT findings, diagnosis difficult, often misdiagnosed as other types of intracranial tumors. From August 1980 to July 1984, our department treated 157 patients with benign intracranial meningiomas proved surgically and pathologically. There were 144 cases (91.7%) with typical CT manifestations, all of which were correctly diagnosed before operation. CT scan of more than 13 cases showed atypical manifestations, are as follows.