{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T23:30:53Z","timestamp":1788219053474,"version":"build-2803163510"},"reference-count":19,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2021,8,5]],"date-time":"2021-08-05T00:00:00Z","timestamp":1628121600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2021,8,5]],"date-time":"2021-08-05T00:00:00Z","timestamp":1628121600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Neuroradiology"],"published-print":{"date-parts":[[2022,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec>\n                <jats:title>Purpose<\/jats:title>\n                <jats:p>Endovascular treatment of posterior communicating artery aneurysms with fetal-type posterior communicating artery originating from the aneurysm dome is often challenging because, with conventional techniques, dense packing of aneurysms for posterior communicating artery preservation is difficult; moreover, flow-diversion devices are reportedly less effective. Herein, we describe a novel method called the \u03bb stenting technique that involves deploying stents into the internal carotid artery and posterior communicating artery.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>Between January 2018 and September 2020, the \u03bb stenting technique was performed to treat eight consecutive cases of aneurysms. All target aneurysms had a wide neck (dome\/neck ratio &lt; 2), a fetal-type posterior communicating artery with hypoplastic P1, and a posterior communicating artery originating from the aneurysm dome. The origin of the posterior communicating artery from the aneurysm, relative to the internal carotid artery, was steep (&lt; 90\u00b0: V shape).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The maximum aneurysm size was 8.0 \u00b1 1.9 mm (6\u201312 mm). The average packing density (excluding one regrowth case) was 32.7 \u00b1 4.2% (26.8\u201339.1%). Initial occlusion was complete occlusion in 6 (75.0%) patients and neck remnants in 2 (25.0%) patients. Follow-up angiography was performed at 18.4 \u00b1 11.6 months (3\u201338 months). There were no perioperative complications or reinterventions required during the study period.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>The \u03bb stenting technique enabled dense coil packing and preservation of the posterior communicating artery. This technique enabled safe and stable coil embolization. Thus, it could become an alternative treatment option for this sub-type of intracranial aneurysms.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00234-021-02775-y","type":"journal-article","created":{"date-parts":[[2021,8,5]],"date-time":"2021-08-05T07:02:51Z","timestamp":1628146971000},"page":"151-159","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["\u03bb stenting: a novel technique for posterior communicating artery aneurysms with fetal-type posterior communicating artery originating from the aneurysm dome"],"prefix":"10.1007","volume":"64","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5015-8573","authenticated-orcid":false,"given":"Jun","family":"Tanabe","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8909-2949","authenticated-orcid":false,"given":"Ichiro","family":"Nakahara","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shoji","family":"Matsumoto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshio","family":"Suyama","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Morioka","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akiko","family":"Hasebe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sadayoshi","family":"Watanabe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kenichiro","family":"Suyama","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kiyonori","family":"Kuwahara","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keiko","family":"Irie","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,8,5]]},"reference":[{"key":"2775_CR1","first-page":"33","volume-title":"Microneurosurgery","author":"MG Yasargil","year":"1984","unstructured":"Yasargil MG (1984) Internal carotid artery aneurysms. Microneurosurgery, vol II. Thieme Stratton Inc, New York, pp 33\u2013123"},{"key":"2775_CR2","doi-asserted-by":"publisher","first-page":"609","DOI":"10.3171\/2014.9.JNS141749","volume":"123","author":"RF Spetzler","year":"2015","unstructured":"Spetzler RF, McDougall CG, Zabramski JM et al (2015) The Barrow Ruptured Aneurysm Trial: 6-year results. J Neurosurg 123:609\u2013617","journal-title":"J Neurosurg"},{"key":"2775_CR3","doi-asserted-by":"publisher","first-page":"809","DOI":"10.1016\/S0140-6736(05)67214-5","volume":"366","author":"AJ Molyneux","year":"2005","unstructured":"Molyneux AJ, Kerr RSC, Yu LM, Clarke M, Sneade M, Yarnoid JASP (2005) International subarachnoid aneurysms trial (ISAT) of neurosurgical clipping versus endovascular coiling in 2143 patients with ruptured intracranial aneurysms. Lancet (London, England) 366:809\u2013817","journal-title":"Lancet (London, England)"},{"key":"2775_CR4","doi-asserted-by":"publisher","first-page":"88","DOI":"10.4103\/2152-7806.74147","volume":"1","author":"K Golshani","year":"2010","unstructured":"Golshani K, Ferrell A, Zomorodi A et al (2010) A review of the management of posterior communicating artery aneurysms in the modern era. Surg Neurol Int 1:88","journal-title":"Surg Neurol Int"},{"key":"2775_CR5","doi-asserted-by":"publisher","first-page":"783","DOI":"10.1136\/neurintsurg-2019-015531","volume":"12","author":"HH Choi","year":"2020","unstructured":"Choi HH, Cho YD, Yoo DH et al (2020) Impact of fetal-type posterior cerebral artery on recanalization of posterior communicating artery aneurysms after coil embolization: matched-pair case-control study. J Neurointerv Surg 12:783\u2013787","journal-title":"J Neurointerv Surg"},{"key":"2775_CR6","doi-asserted-by":"publisher","first-page":"695","DOI":"10.1093\/neuros\/nyx293","volume":"82","author":"AK Roy","year":"2018","unstructured":"Roy AK, Howard BM, Haussen DC et al (2018) Reduced efficacy of the pipeline embolization device in the treatment of posterior communicating region aneurysms with fetal posterior cerebral artery configuration. Neurosurgery 82:695\u2013700","journal-title":"Neurosurgery"},{"key":"2775_CR7","doi-asserted-by":"publisher","first-page":"e1232","DOI":"10.1016\/j.wneu.2019.04.112","volume":"127","author":"L Rinaldo","year":"2019","unstructured":"Rinaldo L, Brinjikji W, Cloft H et al (2019) Effect of fetal posterior circulation on efficacy of flow diversion for treatment of posterior communicating artery aneurysms: a multi-institutional study. World Neurosurg 127:e1232\u2013e1236","journal-title":"World Neurosurg"},{"key":"2775_CR8","doi-asserted-by":"publisher","first-page":"496","DOI":"10.1136\/neurintsurg-2014-011258","volume":"7","author":"JR Mascitelli","year":"2015","unstructured":"Mascitelli JR, Moyle H, Oermann EK et al (2015) An update to the Raymond-Roy Occlusion Classification of intracranial aneurysms treated with coil embolization. J Neurointerv Surg 7:496\u2013502","journal-title":"J Neurointerv Surg"},{"key":"2775_CR9","doi-asserted-by":"publisher","first-page":"332","DOI":"10.1002\/ccd.20120","volume":"63","author":"JA Ormiston","year":"2004","unstructured":"Ormiston JA, Currie E, Webster MWI et al (2004) Drug-eluting stents for coronary bifurcations: Insights into the crush technique. Catheter Cardiovasc Interv 63:332\u2013336","journal-title":"Catheter Cardiovasc Interv"},{"key":"2775_CR10","doi-asserted-by":"publisher","unstructured":"Lanzino G, Kallmes DF (2013) REVIEW ARTICLE Review of 2 decades of aneurysm-recurrence literature , Part 1\u202f: reducing recurrence after endovascular coiling. Ajnr Am J Neuroradiol 21\u201323.\u00a0https:\/\/doi.org\/10.3174\/ajnr.A3032","DOI":"10.3174\/ajnr.A3032"},{"key":"2775_CR11","doi-asserted-by":"publisher","first-page":"1310","DOI":"10.3174\/ajnr.A2961","volume":"33","author":"K-J Zhao","year":"2012","unstructured":"Zhao K-J, Yang P-F, Huang Q-H et al (2012) Y-configuration stent placement (crossing and kissing) for endovascular treatment of wide-neck cerebral aneurysms located at 4 different bifurcation sites. AJNR Am J Neuroradiol 33:1310\u20136","journal-title":"AJNR Am J Neuroradiol"},{"key":"2775_CR12","doi-asserted-by":"publisher","first-page":"456","DOI":"10.1177\/1591019915590532","volume":"21","author":"Z Chen","year":"2015","unstructured":"Chen Z, Niu Y, Tang J et al (2015) Endovascular treatment of posterior communicating artery aneurysms in the presence of the fetal variant of posterior cerebral artery. Interv Neuroradiol 21:456\u201361","journal-title":"Interv Neuroradiol"},{"key":"2775_CR13","doi-asserted-by":"publisher","first-page":"2171","DOI":"10.3174\/ajnr.A3541","volume":"34","author":"YD Cho","year":"2013","unstructured":"Cho YD, Lee WJ, Kim KM et al (2013) Stent-assisted coil embolization of posterior communicating artery aneurysms. AJNR Am J Neuroradiol 34:2171\u20132176","journal-title":"AJNR Am J Neuroradiol"},{"key":"2775_CR14","doi-asserted-by":"publisher","first-page":"564","DOI":"10.3171\/2016.2.JNS152544","volume":"126","author":"B Daou","year":"2017","unstructured":"Daou B, Valle-Giler EP, Chalouhi N et al (2017) Patency of the posterior communicating artery following treatment with the Pipeline Embolization Device. J Neurosurg 126:564\u2013569","journal-title":"J Neurosurg"},{"key":"2775_CR15","doi-asserted-by":"publisher","first-page":"1064","DOI":"10.3171\/2016.4.JNS16147","volume":"126","author":"L Rangel-Castilla","year":"2017","unstructured":"Rangel-Castilla L, Munich SA, Jaleel N et al (2017) Patency of anterior circulation branch vessels after Pipeline embolization: longer-term results from 82 aneurysm cases. J Neurosurg 126:1064\u20131069","journal-title":"J Neurosurg"},{"key":"2775_CR16","doi-asserted-by":"publisher","first-page":"55","DOI":"10.1227\/01.NEU.0000335070.37943.09","volume":"63","author":"G Zada","year":"2008","unstructured":"Zada G, Breault J, Liu CY et al (2008) Internal carotid artery aneurysms occurring at the origin of fetal variant posterior cerebral arteries: surgical and endovascular experience. Neurosurgery 63:55\u201362","journal-title":"Neurosurgery"},{"key":"2775_CR17","doi-asserted-by":"publisher","first-page":"285","DOI":"10.1227\/NEU.0b013e318256c3eb","volume":"71","author":"N Sanai","year":"2012","unstructured":"Sanai N, Caldwell N, Englot DJ, Lawton MT (2012) Advanced technical skills are required for microsurgical clipping of posterior communicating artery aneurysms in the endovascular era. Neurosurgery 71:285\u2013295","journal-title":"Neurosurgery"},{"key":"2775_CR18","doi-asserted-by":"publisher","first-page":"e905","DOI":"10.1016\/j.wneu.2018.01.002","volume":"111","author":"J Tanabe","year":"2018","unstructured":"Tanabe J, Ishikawa T, Moroi J et al (2018) Impact of right-sided aneurysm, rupture status, and size of aneurysm on perforator infarction following microsurgical clipping of posterior communicating artery aneurysms with a distal transsylvian approach. World Neurosurg 111:e905\u2013e911","journal-title":"World Neurosurg"},{"key":"2775_CR19","doi-asserted-by":"publisher","first-page":"381","DOI":"10.1227\/NEU.0000000000001131","volume":"78","author":"H Fukuda","year":"2016","unstructured":"Fukuda H, Hayashi K, Yoshino K et al (2016) Impact of aneurysm projection on intraoperative complications during surgical clipping of ruptured posterior communicating artery aneurysms. Neurosurgery 78:381\u2013390","journal-title":"Neurosurgery"}],"container-title":["Neuroradiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00234-021-02775-y.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s00234-021-02775-y\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00234-021-02775-y.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,1,3]],"date-time":"2022-01-03T18:20:19Z","timestamp":1641234019000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s00234-021-02775-y"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,8,5]]},"references-count":19,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2022,1]]}},"alternative-id":["2775"],"URL":"https:\/\/doi.org\/10.1007\/s00234-021-02775-y","relation":{},"ISSN":["0028-3940","1432-1920"],"issn-type":[{"value":"0028-3940","type":"print"},{"value":"1432-1920","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,8,5]]},"assertion":[{"value":"16 May 2021","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"19 July 2021","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"5 August 2021","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Ichiro Nakahara reports grants from Kaneka Medix, Medtronic, and Nipro, and consultancy from Kaneka Medix, and Medicos Hirata, outside the submitted work.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}},{"value":"The present study is a retrospective review of medical charts and radiographic data. The study protocol was conducted in accordance with the principles of the Declaration of Helsinki and approved by the institutional ethics committee (HM 20-297).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval"}},{"value":"The need for written informed consent for participation was waived in accordance with the national legislation and institutional requirements. On our institute\u2019s website, all participants were provided with the opportunity to opt out of this study.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent to participate"}},{"value":"Written informed consent for publication was obtained from the participants.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}}]}}