Clinicopathologic Analysis of Meningioma

ABSTRACT

The authors analyzed the clinical and pathological characteristics of 66 meningioma patients, operated and pathologically confirmed at the Department of Neurosurgery > Pathology, Yeungnam University Hospital from 1984 to 1992. The results are as follows 1) Meningioma was the most common in the 6th decase(39.4%) and the overall ratio of male to female was 12.5. 2) The most common pathologic types were meningothelial type(30.3%) and transitional type(30.3%). 3) The predilection sites were convexity, parasagittal and falx in order of frequency. 4) The most common clinical features were IICP signs(57.6%). 5) The marginal contour of the tumor on brain CT wre more irregular, mushrooming and fringing pattern in the case of angioblastic and atypical type. The brain edema was more severe in the case of these types. However, these findings had no correlation with prognosis. 6) Thre were 9 atypical cases(13.6%). 7) The total removal was done in 53 cases(80.3%) and the postoperative mortality rate was 7.5%. 8) The recurrence rate was 9.0% and the mean duration of recurrence was 36.5 months. The recurrence depended on grade of the surgical removal rather than the pathological type.