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Large nidus of malformed vessels with serpigenous appearance (bag of worm) seen involving the right superior temporal and inferior frontal regions. Although large no mass effect could be detected. Arterial supply derived from the right posterior and middle cerebral arteries. venous drainage to the cortical veins and right internal cerebral vein. No hemorrhage could be detected. It displays flow void signal in T2 and SWI with homogenous contrast enhancement after contrast administration.