Official title: Outcomes of Intra-arterial and Endosaccular Flow Diverters for Treatment of Intracranial Aneurysms - International Registry of Intra-arterial and Endosaccular Flow Diverters (IRF) Summary: This multicenter retrospective cohort study aims to evaluate and compare the technical performance, safety, and clinical outcomes of intracranial aneurysms treated with flow diverter stents and endosaccular flow disruptors. Conditions: Intracranial Aneurysm Keywords: Endovascular, Registry, Flow Diverter Stents, Endosaccular Flow Disruptors, Flow Diversion Study type: OBSERVATIONAL Enrollment: 5000 (ESTIMATED) Status: RECRUITING Completion: 2026-06 (ESTIMATED)