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本文为了探讨恶性脑膜瘤的术前定性诊断要点和影响预后的因素，将１４例恶性脑膜瘤按ＣＴ影像特点分为两组：ＣＴ表现符合典型脑膜瘤特征组５例，不符合典型脑膜瘤特征组９例，对其影像与临床特征进行了分析总结，并对其预后随访３年。结果：病程短于６个月者９例；平均年龄５３．４岁；瘤体呈低或混杂密度者７例；８例呈不均匀强化或厚壁强化；８例呈浸润性生长；１１例瘤周水肿在中度以上，７例呈指压状水肿。预后在Ⅲ级以下者６例，３年死亡率１４．２％。结论：发病年龄、病程、临床表现、轻重、肿瘤密度（ＣＴ值）、强化效应、生长方式及瘤周水肿等因素是恶性脑膜瘤定性诊断要点，其预后与以上因素有一定相关。接近于Ⅱ级星形细胞瘤的预后。
In this paper, in order to explore the preoperative qualitative diagnosis of malignant meningioma and prognostic factors, 14 cases of malignant meningiomas according to the characteristics of CT images were divided into two groups: CT findings in line with the typical characteristics of meningioma in 5 cases, does not meet the typical meningioma characteristics Group of 9 cases, the imaging and clinical features were analyzed and summarized, and its prognosis was followed up for 3 years. Results: The duration of disease was less than 6 months in 9 cases; the average age was 53.4 years; the tumor was low or mixed density in 7 cases; 8 cases of uneven enhancement or thick wall enhancement; 8 cases showed invasive growth; 11 cases Peritumor edema in the moderate above, seven cases were finger-like edema. The prognosis in grade Ⅲ in 6 cases, 3-year mortality rate of 14.2%. Conclusion: Factors such as age, course of disease, clinical manifestation, severity, tumor density (CT value), enhancement effect, growth pattern and peritumorous edema are the qualitative diagnosis points of malignant meningioma. The prognosis is related to the above factors. Close to the prognosis of grade Ⅱ astrocytoma.