Review of incompletely occluded surgically treated cerebral aneurysms.

Among the 837 cases of direct surgical treatment of single saccular aneurysms in our clinic from 1961 until September, 1975, postoperative angiograms were obtained in 578 cases and an investigation showed 41 had residual aneurysms. Of these, 19 were further treated by muscle wrapping or wrapping subsequent to treatment ofhe neck. Postoperative angiograms revealed residual aneurysms in 22 cases (3.8%) in which insufficient surgical treatment was performed.