Efficacy and Limitations of Stent-Free Coil Embolization for Internal Carotid–Posterior Communicating Artery Aneurysms, Primarily Based on the Double-Catheter Technique: A Study Reflecting Current Endovascular Practice

Stent-free coil embolization achieved high rates of complete occlusion in aneurysms with a neck diameter <4.25 mm. However, despite the adoption of modern coils and advanced techniques such as the double-catheter method, larger aneurysms exceeding this cutoff may recur during midterm follow-up, underscoring the need for alternative treatment strategies.