[A case of intracerebral AVM fed by the anterior ethmoidal artery].

Only 27 cases of dural AVM fed by the anterior ethmoid artery have been reported in the literature. Their nidi were usually in the dura mater. In our case, the nidus was located in the brain parenchyma, although its feeder was the dural artery. A 75-year-old man was admitted to our department because of disturbed consciousness. CT scan showed intracerebral hemorrhage in the left frontal region with ventricular perforation, and subarachnoid hemorrhage in the suprasellar cistern. Left carotid angiography revealed an AVM in the anterior cranial fossa, fed by the anterior ethmoidal artery and drained by a cortical vein, which was dilated with some vascular sacs. A left frontal craniotomy was performed. The subcortical hematoma was removed, and then, after retracing the frontal lobe, two feeders penetrating the dura mater were identified and clipped. The nidus of the AVM with aneurysmal vascular dilatation could be seen on the cortical surface. It was coagulated and removed en-bloc. Histologically, the malformation consisted of thickened dilated veins and distorted small arteries. Postoperative angiography revealed no vascular anomaly. The patient was discharged with mild aphasia and mild right hemiparesis.