Pseudoaneurysm formation caused by the withdrawal of a Trevo ProVue stent at a tortuous cerebral vessel: a case report

• Published in: Acta neurochirurgica Vol. 158; no. 11; pp. 2085 - 2088
• Main Authors: Misaki, Kouichi, Uchiyama, Naoyuki, Mohri, Masanao, Kamide, Tomoya, Tsutsui, Taishi, Kanamori, Naomi, Kurokawa, Keisuke, Nakada, Mitsutoshi
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 01.11.2016; Springer Nature B.V
• Subjects: Aged; Aneurysm, False - etiology; Case Report - Vascular; Embolization, Therapeutic - adverse effects; Female; Humans; Interventional Radiology; Mechanical Thrombolysis - adverse effects; Medicine; Medicine & Public Health; Minimally Invasive Surgery; Neurology; Neuroradiology; Neurosurgery; Stents - adverse effects; Surgical Orthopedics; Complication; Stent retriever; Tortuous vessel; Mechanical thrombectomy; Pseudoaneurysm; Trevo ProVue
• ISSN: 0001-6268; 0942-0940
• DOI: 10.1007/s00701-016-2952-8

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.