Fig. 9

Intraoperative results of patient 47. Coil extrusion can be observed during surgery (a–c). The optic chiasm was severely compressed by the coiled mass (a–c). After exposure and control of the proximal and distal vessels of the aneurysm, careful dissection was performed to free the coiled mass from surrounding structures. The coiled mass was transected (d, e) and half of the coiled mass was removed. (f) The residual half of coiled mass become more mobile and there was adequate neck for clipping. After clipping with one clip, the residual half of coiled mass was removed (g, h). Another clip was placed next to the first clip (i)