Clinical Observation of Intracranial Meningiomas(Computerized Tomographic Findings and Pathological Correlation)

ABSTRACT

Intracranial meningioma is one of the most easily detectable tumor in the preoperative period with the brain computerized tomographic(CT) scan. Although most of them are of benign nature, they present tendency to invade surrounding brain tissue and to recur in spite of complete surgical removal. Authors analysed the clinical features of 27 cases of histologically verified meningiomas and attempted to study the correlation between CT findings and histological types to predict their clinical invasiveness and aggressiveness. Female was predominated in occurance than male in the ratio of 1710. Mean age of occurance was 40.5-year-old. The most frequent symptoms and signs were headache, papilledema and visual disturbance in order. The most frequent histological type was meningotheliomatous type(55.6%) which was followed by transitional(18.5%), fibroblastic(18.5%) and angioblastic(7.4%) types. In the finding of the brain CT scan, perifocal brain edema was noticed in nearly almost cases and high density of the tumor mass in the precontrast CT scan was predominated in transitional and fibroblastic types. But, marked perifocal brain edema, irregular tumor margin, loss of homogeneity of the tumor density and marked contrast enhancement, which were considered to be more aggressive and invasive findings, were predominated in the meningotheliomatous and angioblastic types. So, these types seemed to be more aggressive and invasive than other types. Large cystic meningiomas were 14.8% in author's cases.