{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,21]],"date-time":"2026-05-21T11:07:26Z","timestamp":1779361646732,"version":"3.51.4"},"reference-count":40,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"20","license":[{"start":{"date-parts":[[2026,5,18]],"date-time":"2026-05-18T00:00:00Z","timestamp":1779062400000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Neurosurg Case Lessons"],"published-print":{"date-parts":[[2026,5,18]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND<\/jats:title>\n                    <jats:p>Basilar artery perforator pseudoaneurysms are rare vascular lesions that present significant diagnostic and therapeutic challenges. Their management remains unstandardized, with limited evidence guiding treatment decisions.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>OBSERVATIONS<\/jats:title>\n                    <jats:p>The authors report the case of a 74-year-old man with multiple comorbidities who presented with subarachnoid hemorrhage (SAH). Initial CT\/CT angiography revealed diffuse SAH with intraventricular extension. Digital subtraction angiography demonstrated a pseudoaneurysm arising from a basilar perforator. The absence of an accessible inflow combined with the prohibitive procedural and surgical risks, neither endovascular embolization nor open surgery was attempted. Thus, conservative management was pursued, and repeat angiography on postoperative day 2 revealed spontaneous thrombosis of the pseudoaneurysm. Despite radiographic resolution, the patient\u2019s course was complicated by vasospasm, infarction, and persistent coma, resulting in the patient\u2019s death on day 21.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>LESSONS<\/jats:title>\n                    <jats:p>Basilar perforator pseudoaneurysms are rare lesions that may be occult on initial imaging; repeat angiography is essential when posterior-circulation SAH lacks an identified source. Endovascular treatment risks perforator occlusion or require antiplatelets in an acute SAH setting. Open surgery also has its limitations with deep exposure, lack of proximal\/distal control, and intraoperative rupture. Since neither route is safely feasible, conservative management with intensive neurocritical care and serial imaging is often the management approach. Unfortunately, radiographic thrombosis does not ensure recovery.<\/jats:p>\n                    <jats:p>\n                      <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/thejns.org\/doi\/10.3171\/CASE25779\">https:\/\/thejns.org\/doi\/10.3171\/CASE25779<\/jats:ext-link>\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/case25779","type":"journal-article","created":{"date-parts":[[2026,5,18]],"date-time":"2026-05-18T12:55:33Z","timestamp":1779108933000},"source":"Crossref","is-referenced-by-count":0,"title":["Subarachnoid hemorrhage from a basilar artery perforator pseudoaneurysm: a rare challenging lesion in the posterior circulation. Illustrative case"],"prefix":"10.3171","volume":"11","author":[{"given":"Tenzing","family":"Lhamo","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, University of Wisconsin Hospital, Madison, and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Muhaison Hanifa","family":"Ibrahim","sequence":"additional","affiliation":[{"name":"University of Wisconsin, School of Medicine and Public Health (UWSMPH), Madison, Wisconsin"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1928-6737","authenticated-orcid":true,"given":"Benjamin","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of Wisconsin Hospital, Madison, and"},{"name":"University of Wisconsin, School of Medicine and Public Health (UWSMPH), Madison, Wisconsin"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Laura Stone","family":"McGuire","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of Wisconsin Hospital, Madison, and"},{"name":"University of Wisconsin, School of Medicine and Public Health (UWSMPH), Madison, Wisconsin"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"issue":"1","key":"bib1","series-title":"Neurosurg Focus","first-page":"e4","article-title":"Traumatic intracranial aneurysms","volume":"8","author":"Larson","year":"2000","unstructured":"Larson PSReisner AMorassutti DJAbdulhadi BHarpring JE.Traumatic intracranial aneurysms. 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Neurosurg Focus. 2017;42(6):E9. doi:10.3171\/2017.3.FOCUS1735"},{"issue":"1","key":"bib10","series-title":"J Neurosurg Pediatr","first-page":"90","article-title":"Flow diversion of a recurrent, iatrogenic basilar tip aneurysm in a pediatric patient: case report","volume":"21","author":"Sastry","year":"2018","unstructured":"Sastry RAKoch MJGrannan BLStapleton CJButler WEPatel AB.Flow diversion of a recurrent, iatrogenic basilar tip aneurysm in a pediatric patient: case report. J Neurosurg Pediatr. 2018;21(1):90-93. doi:10.3171\/2017.7.PEDS17235"},{"issue":"5","key":"bib11","series-title":"J Neurosurg","first-page":"1107","article-title":"Spontaneous resolution of perforator aneurysms of the posterior circulation","volume":"121","author":"Chavent","year":"2014","unstructured":"Chavent ALefevre PHThouant PSpontaneous resolution of perforator aneurysms of the posterior circulation. 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