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- Title
Rim enhancement of meningiomas on fast FLAIR imaging.
- Authors
Oguz, K. K.; Cila, A.
- Abstract
We investigated the enhancement patterns of meningiomas on fast fluid-attenuated inversion- recovery (FLAIR) images and related them to the size and histology of the tumour and the associated oedema. We studied 30 meningiomas with T2-weighted fast spin-echo (SE) images plus Ti-weighted SE images with magnetisation-transfer saturation and fast FLAIR before and after contrast enhancement at 0.5 tesla. There were 21 meningiomas (70%) which showed peripheral (rim) enhancement on fast FLAIR, while only one, which showed heavy central calcification, enhanced pe- ripherally on the SE images. Of the meningiomas with capsular enhancement on fast FLAIR 20 (95%) were more than 2 cm in diameter. The nine 9 smaller meningiomas enhanced homogeneously. This difference was statistically significant pattern (P <0.01). All meningiomas which had associated oedema showed the capsular pattern although their number (6; 20%) was to small to analyse statistically. Only 11 (36%) tumours were examined histologically; peripheral enhancement was observed in all types of meningioma. This pattern may help to differentiate meningiomas from other extra-axial masses.
- Subjects
MENINGIOMA; TUMORS; CALCIFICATION; EDEMA; BRAIN tumors; PATIENTS
- Publication
Neuroradiology, 2003, Vol 45, Issue 2, p78
- ISSN
0028-3940
- Publication type
Article
- DOI
10.1007/s00234-002-0914-8