RADIOLOGICAL FEATURES WITH PATHOLOGICAL CORRELATION IN MENINGIOMAS
Abstract
A radiologic-pathological correlation of meningioma and it subtypes was studied. Forty-four patients with 50 surgically excised tumors between 1993 and 1997 were analyzed. The most common location was at the convexity (40%). The majority of meningiomas were isodense on noncontrast CT and enhanced strongly on postcontrast CT scans. Edema was often presented on CT and MRI studies. Pronounced edema was significantly correlated with lesion >3 cm in diameter. Tumor calcification was seen in 36% of CT scans.
Hyperostosis and bone erosion were found in 23% and 21% on CT scans, respectively. There was a correlation between hyperostosis and sphenoidal ridge location. On CT scans, focal non-enhancing low density areas are seen in 25% of all tumors, and correlated significantly with meningothelial subtype.
On MRI studies, the tumors were mostly isointense to the gray matter on Tl-weighted images, iso and hyperintensities on PD-weighted and T2-weighted images. The lesions were strongly enhanced with gadolinium. There was no correlation JAN. - APR. 1999. Volume V NumberI between the signal intensities and histological subtype.
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