Journal List > J Korean Radiol Soc > v.16(1) > 1137492

Lee, Kim, Suh, and Choi: Computed tomographic evaluation of meningioma

Abstract

Meningioma arises from arachnoid cells imbedded in the dura and constitutes approximately 15% of allintracranial neoplasms, Its diagnosis could be made accurately on clinical grounds and characteristic appearancesof plain x-rays and angiography, but CT is undoubtedly the most accuratediagnostic method yet available. AT thedepartment of radiology, Kyung Hee University Hospital, 33 patients of intracranial meningiomas were examined withEMI 5005 CT scanner frm Oct. 1977 to July 1979 . The following results were obtained. 1. The correct diagnosis wasmade in 31 out of 33 cases (94%). 2. Sex ratio was 20 females to 13 males and the greatest number of cases (36%)were seen in fifth decade. 3. The prevalent sites were convexity (27%), Falx (15%) and parasagittal (12%) inorders. 4. The precontast scans appeared as isodensity in 16 cases (48%), high density in 11 cases (33%) andheterogenous density in 6 cases (18%). In contrast study, all of the meningiomas were enhanced and well defined.The most frequent enhancement pattern was dense homogenous enhancement in 18 cases (55). 5. Intratumoralcalacifications of various extent were found in 7 out of 33 cases (21%). 6. Peritumoral low density area waspresent in 29 cases (88%) and it tend to be minimal in 66% moderate in 31% and marked in 3%. 7. Tumor adjacenthyperostosis was found in 10 cases (30%). 8. All of meningiomas showed mass effects. 9 Two meningiomas weremisdaignosed as a pituitary adenoma and a glioblastoma multiforme.

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