Occipital-posterior cerebral artery bypass via the occipital interhemispheric approach
A 51-year-old male presented with subarachnoid hemorrhage due to rupture of a PCA aneurysm. The lesion was treated by endovascular coil embolization twice because of coil compaction. Follow-up examination by cerebral angiography at 1 month demonstrated recurrence of coil compaction []. We therefore performed OA-RA-PCA bypass using an occipital interhemispheric approach. The patient subsequently underwent endovascular embolization of the parent artery. The patient experienced upper quadrant hemianopsia due to infarction in the posterior temporal region after the endovascular procedure, which was associated with occlusion of the posterior temporal artery branching at the base of the aneurysm. Three-dimensional CT revealed bypass patency [].