Endoscope-assisted microsurgery for cerebral aneurysms.

We performed endoscope-assisted microsurgery for 64 patients with cerebral aneurysms from June 1998 to January 1999. Two patients were treated under picture-in-picture imaging using a surgical microscope connected with an endoscopic-image display system. The study included 34 patients with incidental discovery: 3 IC oph, aneurysm, 1 from cavernous (C3) portion, 8 at ICPC, 1 from infundibular dilatation, 2 at IC bifurcation, 6 at AcoA, 1 at A1A2, 8 at MCA, 1 at P1, 1 from basilar tip, 1 at AICA, 1 at VA and 1 from PICA. The study also included 30 patients with subarachnoid hemorrhage: 5 ICPC, 2 from anterior choroidal, 1 from IC infundibular dilatation, 10 from AcoA, 2 from A2A3, 7 from MCA, 2 from basilar tip and 1 from PICA. They were classified into gr. 1 for 2, gr. 2 for 8, gr. 3 for 10, gr. 4 for 7, and gr. 5 for 3 cases.