{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T08:44:15Z","timestamp":1785919455396,"version":"3.56.0"},"reference-count":37,"publisher":"SAGE Publications","issue":"4","license":[{"start":{"date-parts":[[2023,1,19]],"date-time":"2023-01-19T00:00:00Z","timestamp":1674086400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2023,1,19]],"date-time":"2023-01-19T00:00:00Z","timestamp":1674086400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Interv Neuroradiol"],"published-print":{"date-parts":[[2026,8]]},"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Repeat angiography will identify vascular pathology in approximately 10% of cases following angiogram-negative subarachnoid hemorrhage (anSAH), but small atypical aneurysms of the basilar artery are very uncommon.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To report a case series of delayed appearance of nontraumatic basilar artery small atypical aneurysms.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>IRB approval was obtained for this retrospective case series and patient consent was waived.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Herein we report three cases of spontaneous anSAH, all of whom had a negative digital subtraction angiogram (DSA) on admission and all of whom had appearance of a small atypical aneurysms of the upper basilar trunk\/apex on follow-up imaging (two during the initial admission and one in a delayed fashion). All three patients were ultimately treated with flow diversion (although one patient underwent attempted coiling that was abandoned due to inability to catheterize the aneurysm).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>This report highlights the importance of a repeat DSA in cases of anSAH as well as the importance of scrutinizing the basilar trunk for these very small atypical aneurysms that may go unnoticed.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/15910199231151274","type":"journal-article","created":{"date-parts":[[2023,1,20]],"date-time":"2023-01-20T01:00:50Z","timestamp":1674176450000},"page":"1990-1997","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["Delayed appearance of basilar trunk small atypical aneurysms in nontraumatic, initially angiogram-negative subarachnoid hemorrhage: A report of three patients"],"prefix":"10.1177","volume":"32","author":[{"given":"William C","family":"Johnson","sequence":"first","affiliation":[{"name":"University of Texas Health Science Center San Antonio"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthew R","family":"Webb","sequence":"additional","affiliation":[{"name":"University of Texas Health Science Center San Antonio"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4080-6415","authenticated-orcid":false,"given":"Jonathan W","family":"Espinosa","sequence":"additional","affiliation":[{"name":"University of Texas Health Science Center San Antonio"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lee A","family":"Birnbaum","sequence":"additional","affiliation":[{"name":"University of Texas Health Science Center San Antonio"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pavel","family":"Rodriguez","sequence":"additional","affiliation":[{"name":"University of Texas Health Science Center San Antonio"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Justin R","family":"Mascitelli","sequence":"additional","affiliation":[{"name":"University of Texas Health Science Center San Antonio"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2023,1,19]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1177\/1971400917743100"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1161\/STROKEAHA.117.019843"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1136\/neurintsurg-2019-015375"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.3389\/fneur.2020.00582"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1136\/bcr-2012-010573"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1080\/02688697.2018.1445197"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/0140-6736(91)91836-J"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00701-009-0518-8"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.1007\/s12028-009-9203-2"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1097\/01376517-200706000-00003"},{"key":"e_1_3_3_12_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.STR.0000260093.49693.7a"},{"key":"e_1_3_3_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jstrokecerebrovasdis.2012.02.001"},{"key":"e_1_3_3_14_2","doi-asserted-by":"publisher","DOI":"10.3174\/ajnr.A4806"},{"key":"e_1_3_3_15_2","doi-asserted-by":"publisher","DOI":"10.3174\/ajnr.A3291"},{"key":"e_1_3_3_16_2","unstructured":"Dalyai R Chalouhi N Theofanis T et al. Subarachnoid hemorrhage with negative initial catheter angiography: a review of 254 cases evaluating patient clinical outcome and efficacy of short- and long-term repeat angiography. 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