RESUMEN
The authors are reporting aneurysms arising from the hemispheric branch of the superior cerebellar artery(SCA) and PI segment of the posterior cerebral artery(PCA). These aneurysms were discovered after a subarachnoid hemorrhage(SAH). While attempting to make the proper placement of a clip at the aneurysmal neck of the P1 sement of the PCA aneurysm through the left subtemporal approach, because of kinking of the posterior thalamoperforating arteries, the clip repositioned and the remaining part of the aneurysmal neck was wrapped with fibrin glue soaked muscle. The case of an aneurysm arising from the hemispheric branch of the SCA was treated with proper clipping of the aneurysmal neck through the left subtemporal approach with a small division of the tentorium. After reviewing literature, we want to stress the rarity of these aneurysms and discuss the method of surgical approach for such aneurysms arising at the P1 segment of the PCA and the distal SCA.