title: Pseudoaneurysm formation caused by the withdrawal of a Trevo ProVue stent at a tortuous cerebral vessel: a case report.
abstract: This is the first report on the mechanism of pseudoaneurysm formation after withdrawal of a stent retriever. A 79-year-old woman developed cardiogenic embolization of the distal middle cerebral artery (M2). The deployed stent retriever bent because of vessel tortuosity. After withdrawal of the stent with strong resistance, complete revascularization was achieved, but an extravasation was detected at the site. Eight hours after disappearance of the extravasation, re-bleeding occurred with aneurysm-like pooling of contrast media. Direct surgical observation confirmed a pseudoaneurysm formation. The pseudoaneurysm was likely formed by avulsion of a fine vessel during withdrawal of the stent retriever at a tortuous vessel.
authors.affiliation: Department of Neurosurgery, Division of Neuroscience, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan. misaki@med.kanazawa-u.ac.jp.
authors.forename: Kouichi
authors.identifier: 0000-0002-3752-2406
authors.initials: K
authors.lastname: Misaki
authors.affiliation: Department of Neurosurgery, Division of Neuroscience, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
authors.forename: Naoyuki
authors.initials: N
authors.lastname: Uchiyama
authors.affiliation: Department of Neurosurgery, Division of Neuroscience, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
authors.forename: Masanao
authors.initials: M
authors.lastname: Mohri
authors.affiliation: Department of Neurosurgery, Division of Neuroscience, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
authors.forename: Tomoya
authors.initials: T
authors.lastname: Kamide
authors.affiliation: Department of Neurosurgery, Division of Neuroscience, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
authors.forename: Taishi
authors.initials: T
authors.lastname: Tsutsui
authors.affiliation: Department of Disease Control and Homeostasis, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan.
authors.forename: Naomi
authors.initials: N
authors.lastname: Kanamori
authors.affiliation: Department of Disease Control and Homeostasis, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Kurokawa
authors.affiliation: Department of Neurosurgery, Division of Neuroscience, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, 920-8641, Japan.
authors.forename: Mitsutoshi
authors.initials: M
authors.lastname: Nakada
mesh_terms: D000368:Aged; D017541:Aneurysm, False / Q000209:etiology*; D004621:Embolization, Therapeutic / Q000009:adverse effects*; D005260:Female; D006801:Humans; D061185:Mechanical Thrombolysis / Q000009:adverse effects*; D015607:Stents / Q000009:adverse effects*
keywords: Complication; Mechanical thrombectomy; Pseudoaneurysm; Stent retriever; Tortuous vessel; Trevo ProVue