{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,18]],"date-time":"2026-10-18T13:40:38Z","timestamp":1792330838304,"version":"4.4.0"},"reference-count":29,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2002,1]]},"abstract":"<jats:p content-type=\"fine-print\">\u2713 The posterior inferior cerebellar artery (PICA) is known to be very variable, and some of its anatomical variations can explain ischemic complications that occur during endovascular treatment of aneurysms. The authors report two cases of anatomical variation of the PICA that they have called its double origin, one of which gave rise to an aneurysm.<\/jats:p>\n<jats:p content-type=\"fine-print\">The first patient was a 36-year-old man who presented with a subarachnoid hemorrhage related to the rupture of a PICA aneurysm. The aneurysm was treated by the endovascular route. Selective and superselective studies showed that the PICA origin was low on the fourth segment of the vertebral artery (VA). The aneurysm was located on an anastomosis between the PICA and a small upper arterial branch originating from the VA. Embolization was performed through the small branch with no problem, but a lateral medullary infarct followed, probably due to occlusion of the perforating vessels. The same anatomical variation was incidentally discovered in the second patient.<\/jats:p>\n<jats:p content-type=\"fine-print\">To the authors' knowledge, neither this anatomical variation of the PICA nor the aneurysm's topography have been previously described angiographically. This highlights the role of angiography in pretreatment evaluation of aneurysms especially when perforating vessels or small accessory branches that are poorly visualized on angiographic studies are concerned, as in the territory of the PICA. Anatomy is sometimes unpredictable, and the surgeon must be very careful when confronted with these variations because they are potentially dangerous for endovascular treatment.<\/jats:p>","DOI":"10.3171\/jns.2002.96.1.0127","type":"journal-article","created":{"date-parts":[[2009,5,13]],"date-time":"2009-05-13T17:51:36Z","timestamp":1242237096000},"page":"127-131","source":"Crossref","is-referenced-by-count":39,"title":["Ruptured aneurysm on a double origin of the posterior inferior cerebellar artery: a pathological entity in an anatomical variation"],"prefix":"10.3171","volume":"96","author":[{"given":"Anne","family":"Pasco","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francine","family":"Thouveny","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xavier","family":"Papon","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jean-Yves","family":"Tanguy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philippe","family":"Mercier","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine","family":"Caron-Poitreau","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Denis","family":"Herbreteau","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"key":"b1","series-title":"Neurol Res","doi-asserted-by":"publisher","first-page":"171","DOI":"10.1080\/01616412.1994.11740221","article-title":"Microsurgical anatomy of the intracranial part of the vertebral artery.","volume":"16","author":"Akar","year":"1994"},{"key":"b2","series-title":"Arch Neurol Psychiatry","doi-asserted-by":"publisher","first-page":"1243","DOI":"10.1001\/archneurpsyc.1937.02260240123010","article-title":"Arterial supply of lateral parolivary area of the medulla oblongata in man.","volume":"38","author":"Alexander","year":"1937"},{"key":"b3","series-title":"Rev Neurol","first-page":"267","article-title":"Anatomie des art\u00e8res c\u00e9r\u00e9belleuses.","volume":"145","author":"Amarenco","year":"1989"},{"key":"b4","series-title":"Neurology","doi-asserted-by":"publisher","first-page":"852","DOI":"10.1212\/WNL.11.10.852","article-title":"The medullary blood supply and the lateral medullary syndrome.","volume":"11","author":"Baker","year":"1961"},{"key":"b5","series-title":"Acta Anat","doi-asserted-by":"publisher","first-page":"234","DOI":"10.1159\/000147703","article-title":"A rare case of the posterior inferior cerebellar artery.","volume":"152","author":"Cavdar","year":"1995"},{"key":"b6","series-title":"Radiographics","doi-asserted-by":"publisher","first-page":"1079","DOI":"10.1148\/radiographics.12.6.1439013","article-title":"MR imaging of posterior fossa infarctions: vascular territories and clinical correlates.","volume":"12","author":"Cormier","year":"1992"},{"key":"b7","series-title":"J Neurosurg","first-page":"985","article-title":"Report of World Federation of Neurological Surgeons Committee on a Universal Subarachnoid Hemorrhage Grading Scale.","volume":"68","author":"Drake","year":"1988"},{"key":"b8","series-title":"Clin Neurosurg","doi-asserted-by":"publisher","first-page":"96","DOI":"10.1093\/neurosurgery\/26.CN_suppl_1.96","article-title":"The treatment of aneurysms of the posterior circulation.","volume":"26","author":"Drake","year":"1979"},{"key":"b9","series-title":"Prog Neurol Surg","doi-asserted-by":"publisher","first-page":"122","DOI":"10.1159\/000401380","article-title":"Treatment of aneurysms of the posterior cranial fossa.","volume":"9","author":"Drake","year":"1978"},{"key":"b10","series-title":"Arch Physiol Norm Pathol","first-page":"7","article-title":"Sur la distribution des art\u00e9res nourrici\u00e8res du bulbe rachidien.","volume":"2","author":"Duret","year":"1873"},{"key":"b11","series-title":"Human Brainstem Vessels.","first-page":"5","author":"Duvernoy","year":"1978"},{"key":"b12","series-title":"J Neurol Sci","first-page":"103","article-title":"Les infarctus bulbaires. 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