Purpose:This study aimed to evaluate the characteristics of pseudoaneurysms and aneurysms following gastrointestinal surgery treated with endovascular management (i.e., transcatheter arterial embolization or stent-graft placement). Methods:This retrospective study included 17 patients with pseudoaneurysms and 1 patient with an aneurysm following gastrointestinal surgery in a tertiary care hospital between 2011 and 2021. There were 15 men and 3 women aged 37-85 years, with an average age of 67 years. All patients underwent endovascular management. We retrospectively analyzed their angiographic features and clinical outcomes. Results:Arterial embolization was performed in 11 patients, and stent-graft placement was performed in 7 patients. Additional arterial embolization was necessary for another bleeding lesion in 2 patients, while 1 patient died of multiple organ failure. Stent-graft occlusion occurred after a few days in 3 out of 7 patients without any antithrombotic drugs. Extravascular migration of the occluded stentgrafts was observed in 3 out of 7 patients, wherein these stent-grafts migrated to the intestine and eventually disappeared in 2 patients. There were no clinical symptoms related to the occlusion or migration of the stent-grafts. Conclusion:Both arterial embolization and stent-graft place-ment are effective in the management of postoperative pseudoaneurysms and aneurysms. Stent-graft placement is suitable for cases with poor collateral flow because it preserves arterial patency. The use of antithrombotic treatment and the risk of stent-grafts migration should be taken into consideration.

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