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We compared wall apposition characteristics across different FD designs to evaluate inter-device differences.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Retrospective single-center analysis of 104 patients with 127 aneurysms treated with 121 FD (35 Derivo Embolization Devices (DED; Acandis, Pforzheim, Germany), 50\u00a0p64 (Phenox Wallaby, Bochum, Germany), 24\u00a0p48 (Phenox), 11\u00a0Silk (Balt, Montmorency, France), and 1\u00a0Pipeline (Medtronic, Dublin, Ireland)) between February 2013 and June 2023. The analysis focused on fish-mouthing-like deformities (\u2265\u202f10% focal diameter reduction at device ends) and the need for mechanical wall apposition maneuvers, as well as aneurysm occlusion, thrombus-associated events, and neurological outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Fish-mouthing-like deformities occurred more frequently with DED (50.0%) than with other FD-types (27.2%;\n                      <jats:italic>p<\/jats:italic>\n                      \u202f=\u20090.021), mainly due to \u201cpre\u201d-fish-mouthing (31.3% vs. 14.8%;\n                      <jats:italic>p<\/jats:italic>\n                      \u202f=\u20090.047). Mechanical wall apposition maneuvers were more often required in DED cases (60.0% vs. 25.6%;\n                      <jats:italic>p<\/jats:italic>\n                      \u202f&lt;\u20090.001), particularly for proximal malapposition. Aneurysm occlusion rates were comparable at final FU (84.2% vs. 88.6%;\n                      <jats:italic>p<\/jats:italic>\n                      \u202f=\u20090.563). Thrombus-associated events occurred more frequently with DED (29.4% vs. 11.3%;\n                      <jats:italic>p<\/jats:italic>\n                      \u202f=\u20090.008), though neurological outcomes did not differ significantly (6.0% vs.\u00a02.6%;\n                      <jats:italic>p<\/jats:italic>\n                      \u202f=\u20090.148). Mean FU time was 26.0\u202f\u00b1\u200921.0 months.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>DED required more frequent intraprocedural wall apposition maneuvers and showed higher rates of fish-mouthing-like deformities compared with other FD-types. However, long-term aneurysm occlusion and neurological outcomes were comparable. These findings suggest that while DED deployment may require greater technical expertise, its safety and efficacy should be further evaluated in larger, multicenter studies.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00062-026-01651-7","type":"journal-article","created":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T16:59:29Z","timestamp":1776272369000},"page":"963-975","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Incidence of Fish-mouthing and Wall Malapposition of Different Flow Diverters in the Treatment of Cerebral Aneurysms: Device-specific Findings in a\u00a0Retrospective Single-center Analysis"],"prefix":"10.1007","volume":"36","author":[{"given":"Maximilian","family":"Rothe","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"Renz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maria","family":"Berndt-M\u00fcck","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dennis","family":"Hedderich","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dominik","family":"Sepp","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bernhard","family":"Meyer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chiara","family":"Negwer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jannis","family":"Bodden","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jan","family":"Kirschke","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tobias","family":"Boeckh-Behrens","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"Maegerlein","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,4,15]]},"reference":[{"key":"1651_CR1","doi-asserted-by":"publisher","DOI":"10.3390\/jcm13144167","author":"M Gaub","year":"2024","unstructured":"Gaub\u00a0M, Murtha\u00a0G, Lafuente\u00a0M, Webb\u00a0M, Luo\u00a0A, Birnbaum\u00a0LA, et\u00a0al. 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Clin Neuroradiol. 2022;32(2):481\u20139. https:\/\/doi.org\/10.1007\/s00062-021-01086\u20112.","DOI":"10.1007\/s00062-021-01086-2"}],"container-title":["Clinical Neuroradiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00062-026-01651-7.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s00062-026-01651-7","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00062-026-01651-7.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T13:36:37Z","timestamp":1787837797000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s00062-026-01651-7"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,4,15]]},"references-count":29,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2026,9]]}},"alternative-id":["1651"],"URL":"https:\/\/doi.org\/10.1007\/s00062-026-01651-7","relation":{},"ISSN":["1869-1439","1869-1447"],"issn-type":[{"value":"1869-1439","type":"print"},{"value":"1869-1447","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,4,15]]},"assertion":[{"value":"24 November 2025","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"1 April 2026","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"15 April 2026","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"MRo, MRe, CN, and BM declare no competing interests. CM reports consulting fees from Phenox\/Wallaby and Eppdata; honoraria for lectures, presentations, expert testimony, and support for attending meetings and\/or travel from Phenox\/Wallaby and Eppdata GmbH; and stock ownership in NVIDIA. DH reports grants from the German Research Foundation and honoraria from Eisai GmbH, all unrelated to the submitted work; support for meeting attendance and\/or travel from the German Society of Neuroradiology and the European Society of Neuroradiology; and a leadership role on the ESNR AI Committee. DS reports travel and accommodation support from Balt Germany to attend a workshop. JB reports support for attending meetings and\/or travel from BALT and Terumo Neuro. JK reports grants from the German Research Foundation (No. 465242983, paid to institution) for the present manuscript; additional grants from the European Research Council (Horizon 2020, No. 101045128 \u2014 iBack-epic \u2014 ERC-2021-COG, paid to institution), the Bayerische Forschungsstiftung (AZ-1634-24, paid to institution), and the Bavarian Ministry of Economic Affairs, Regional Development and Energy (LSM-2403-0014, paid to institution); consulting fees from Philips (paid to institution); honoraria from Novartis; and stock ownership in Bonescreen GmbH. MB\u2011M reports grants from Terumo Neuro Germany, BALT International, and Stryker GmbH & Co. KG; consulting fees from Terumo Neuro Germany, BALT International, and Stryker GmbH & Co. KG; honoraria from Terumo Neuro Germany, BALT International, and Stryker GmbH & Co. KG; and support for attending meetings and\/or travel from Terumo Neuro Germany, BALT International, and Stryker GmbH & Co. KG. TBB reports honoraria for lectures from Terumo Neuro and BALT, and support for meeting attendance and\/or travel from BALT and Phenox\/Wallaby.","order":1,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Ethics"}}]}}