後頭蓋窩における脳動脈瘤とAVMの合併例

抄録

Five cases of association of subtentorial cerebral aneurysms with AVMs were reported. The site of the aneurysm was bifurcation of the basilar artery in one case, the peripheral superior cerebellar artery in one case, and in three cases the site was the peripheral posterior inferior cerebellar aretry. All AVMs were located at the superior surface of the cerebellum. Subarachnoid hemorrhage was seen in four cases and the bleeding origin was always the aneurysm. Case 1, a 48-year-old-man, died before surgery. Both anerysm and AVM were treated simultaneously in three cases showing SAH, and their postoperative course were uneventful. In Case 5, a 43-year-old-man, only neck-clipping of a non-ruptured aneurysm and microvascular decompression of the right trigeminal nerve was performed. In the literature, there were 13 cases of such association, and in all of them the source of bleeding seemed to be the aneurysm, just as in our experience.