{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T14:45:18Z","timestamp":1791643518531,"version":"4.3.4"},"reference-count":51,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2017,9]]},"abstract":"\n OBJECT<\/jats:title>\n Management of complex aneurysms of the middle cerebral artery (MCA) can be challenging. Lesions not amenable to endovascular techniques or direct clipping might require a bypass procedure with aneurysm obliteration. Various bypass techniques are available, but an algorithmic approach to classifying these lesions and determining the optimal bypass strategy has not been developed. The objective of this study was to propose a comprehensive and flexible algorithm based on MCA aneurysm location for selecting the best of multiple bypass options.<\/jats:p>\n <\/jats:sec>\n \n METHODS<\/jats:title>\n Aneurysms of the MCA that required bypass as part of treatment were identified from a large prospectively maintained database of vascular neurosurgeries. According to its location relative to the bifurcation, each aneurysm was classified as a prebifurcation, bifurcation, or postbifurcation aneurysm.<\/jats:p>\n <\/jats:sec>\n \n RESULTS<\/jats:title>\n Between 1998 and 2015, 30 patients were treated for 30 complex MCA aneurysms in 8 (27%) prebifurcation, 5 (17%) bifurcation, and 17 (56%) postbifurcation locations. Bypasses included 8 superficial temporal artery\u2013MCA bypasses, 4 high-flow extracranial-to-intracranial (EC-IC) bypasses, 13 IC-IC bypasses (6 reanastomoses, 3 reimplantations, 3 interpositional grafts, and 1 in situ bypass), and 5 combination bypasses. The bypass strategy for prebifurcation aneurysms was determined by the involvement of lenticulostriate arteries, whereas the bypass strategy for bifurcation aneurysms was determined by rupture status. The location of the MCA aneurysm in the candelabra (Sylvian, insular, or opercular) determined the bypass strategy for postbifurcation aneurysms. No deaths that resulted from surgery were found, bypass patency was 90%, and the condition of 90% of the patients was improved or unchanged at the most recent follow-up.<\/jats:p>\n <\/jats:sec>\n \n CONCLUSIONS<\/jats:title>\n The bypass strategy used for an MCA aneurysm depends on the aneurysm location, lenticulostriate anatomy, and rupture status. A uniform bypass strategy for all MCA aneurysms does not exist, but the algorithm proposed here might guide selection of the optimal EC-IC or IC-IC bypass technique.<\/jats:p>\n <\/jats:sec>","DOI":"10.3171\/2016.7.jns16772","type":"journal-article","created":{"date-parts":[[2016,11,4]],"date-time":"2016-11-04T09:59:42Z","timestamp":1478253582000},"page":"463-479","source":"Crossref","is-referenced-by-count":98,"title":["Bypass surgery for complex middle cerebral artery aneurysms: an algorithmic approach to revascularization"],"prefix":"10.3171","volume":"127","author":[{"given":"Ali","family":"Tayebi Meybodi","sequence":"first","affiliation":[{"name":"Department of Neurosurgery and"},{"name":"Skull Base and Cerebrovascular Laboratory, University of California, San Francisco, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wendy","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arnau","family":"Benet","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery and"},{"name":"Skull Base and Cerebrovascular Laboratory, University of California, San Francisco, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olivia","family":"Kola","sequence":"additional","affiliation":[{"name":"Skull Base and Cerebrovascular Laboratory, University of California, San Francisco, California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael T.","family":"Lawton","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery and"},{"name":"Skull Base and Cerebrovascular Laboratory, University of California, San Francisco, California"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"key":"b1-jns16772","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"1364","DOI":"10.3171\/2014.3.JNS132219","article-title":"Anterior cerebral artery bypass for complex aneurysms: an experience with intracranial-intracranial reconstruction and review of bypass options","volume":"120","author":"Abla AA,","year":"2014","unstructured":"Abla AA, Lawton MT: Anterior cerebral artery bypass for complex aneurysms: an experience with intracranial-intracranial reconstruction and review of bypass options. 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