vascular anomalies including azygos ACA and hypoplastic A1.

A 59-year-old woman was admitted with complaints of a sud-den onset of dysarthria and left side weakness. Computed to-mography revealed an intracerebral hemorrhage in the right basal ganglia and frontal lobe. Subarachnoid hemorrhage was also identified in the anterior falx and sulci of medial frontal lobes (Fig. 1A). Cerebral angiography demonstrated a saccular aneurysm which arised from the proximal end of the right fe-nestrated A1 segment. The A2 segment of ACA was only visible from the right internal carotid artery. There was another saccu-lar aneurysm at the right middle cerebral artery (MCA) bifur-cation which was considered as an unruptured one because of the long distance from co-existing intracerebral hematoma (Fig. 1B, C, D)