Right frontal paramedian arteriovenous malformation nidus fed predominantly by a branch from the right anterior cerebral artery and drained by enlarged veins that run superiorly through the interhemispheric fissure to the superior sagittal sinus. The nidus measures 2.2 cm in its larger diameter and is not associated with surrounding brain parenchyma intensity abnormalities. Right middle cerebral artery opercular branches are prominent compared to the contralateral circulation and seem to also feed the AVM nidus.
Remainder circle of Willis arteries are unremarkable.