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Journal of Korean Neurosurgical Society 1983;12(1): 39-47.
Clinical Analysis of Intracranial Meningiomas.
Seung Hoon Lee, Byung Kyu Cho, Kil Soo Choi, Bo Sung Sim
Department of Neurosurgery, College of Medicine, Seoul National University, Seoul, Korea.
Authors reviewed 92 cases of intracranial meningiomas which confirmed by operation at the Department of Neurosurgery, Seoul National University Hospital from September 1957 to July 1982. 45 cases out of 50 cases that had performed computerized tomographic(CT) scans preoperatively were analyzed. The results were as following ; 1) Meningiomas constituted 12.4% of all intracranial tumors. There were 51 women and 41 men(55.4%/44.6%). The average age at the time of diagnosis was 41.2 years. 2) The initial symptoms were headache(50.0%), visual disturbance(14.1%), and seizure(8.7%) in the order. 3) The most common location was parasagittal-falcial, and followed by convexity, sphenoid ridge, tuberculum sellae tentorial and olfactory groove. 4) 61 cases(76%) out of 80 cases showed abnormal findings in the plain skull X-ray examinations. The preenhanced CT scans(45 cases) showed hyperdense lesion in 57.8%(26 cases), isodense lesion in 35.6%(16 cases), and hypodense lesion in 6.6%(3 cases). The incidence of peritumoral low density was 68.9%. The detection rate of intratumoral calcification by CT scan was 22.2%, and by plain X-ray was 7.5%, 95.6%(43 cases) of meningiomas showed contrast enhancement. 5) The detection rate of tumors by CT scans was 98%, and 1 case(2%) couldn't be detected by CT scans because it was en plaque type. Preoperatively, 44 cases(88%) were diagnosed as meningiomas and other 6 cases were diagnosed as glioblastoma multiforme, cystic astrocytoma, glioma, and bone tumor by CT scans. 6) The postoperative pathological diagnosis were meningotheliomatous(55.4%), fibroblastic(13.0%), transitional(8.7%), angioblastic(3.3%), and sarcomatous(2.2%).
Key Words: Intracranial meningioma; Computerized tomography; Peritumoral low density; Tumor staining
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