{
  "abstract": "Background Vertebral artery dissecting aneurysms (VADAs) sometimes recur after previous endovascular treatments. If there is evidence of changing size over time or if clinical symptoms worsen (due to mass effect), further retreatment is mandatory. The present study was conducted to assess potential differences in efficacy and safety profiles of additional stent-assisted coiling (SAC) and flow-diverting stent (FDS) use in patients with recurrent VADAs.Method A total of 15 recurrent VADAs were subjected to SAC (n=7) or FDS (n=8) retreatment procedures between April 2009 and January 2023. We retrospectively reviewed pertinent medical records and radiologic data to compare efficacy and safety performances of these modalities.Result Mean values of maximal dissection length and aneurysm depth were 15.6 mm (range, 10.7-25.0 mm) and 13.9 mm (range, 6.3-29.4 mm) in the SAC group, compared with 15.4 mm (range, 7.2-23.6 mm) and 11.0 mm (range, 3.5-23.6 mm), respectively in the FDS group. In three of seven aneurysms, immediate successful occlusion was evident after SAC. There was immediate contrast stagnation in four of eight aneurysms following FDS placement. No procedure-related hemorrhagic or thromboembolic complications occurred in either group. However, follow-up angiography disclosed major recanalization in four members (57.1%) of the SAC group and in three members (37.5%) of the FDS group.Conclusion Reconstructive interventions have proven safe and effective in patients with recurrent VADAs. Unfortunately, follow-up outcomes after retreatment seem worse than initial therapeutic results, even for FDS devices. A larger cohort study is needed to corroborate these findings.Disclosures Y. Cho: None.",
  "authors": [
    {
      "affiliations": [
        "Radiology, Seoul National University Hospital, Seoul, Korea, Republic of"
      ],
      "name": "Y Cho"
    }
  ],
  "title": "E-097 Stent-assisted coil embolization and flow-diverting stent use for retreating recurrent vertebral artery dissecting aneurysms",
  "uid": "5cf3443e-4592-5e69-9197-80b32081a0be"
}