| Abstract: | The introduction of microsurgical techniques has given a new impetus to operative therapy of cerebral aneurysms. Method of choice is clip occlusion of the aneurysmal neck, but this goal cannot always be attained. Usually, fusiform shaped aneurysms and so-called giant aneurysms can only be treated by occlusing the feeding vessels. In such cases the preliminary extra-intracranial bypass provides optimal conditions for interrupting the main feeder. Special points of view regarding these rare aneurysms and their haemodynamic relationships to cerebral circulation are discussed. A therapeutical concept is proposed on the basis of three case reports. |
