Dysembryoplastic neuroepithelial tumour
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There is a cortical-based "bubbly" appearing mass in the right parietal lobe. The coronal FLAIR image shows characteristic ring-like hyperintense signal (bright rim sign). No perifocal edema and no contrast-enhancement are present. Incidental note is made of a septation within the left ventricle.
The findings are consistent with a dysembryoplastic neuroepithelial tumor (DNET).