Effect of endovascular coil embolization for recurrent cerebral aneurysms following surgical clipping

Abstract

Clipping of a cerebral aneurysm is known to have a long-term preventive effect on rebleeding. However, a few cases of recurrent cerebral aneurysm following incomplete clipping have been reported. The efficacy and safety of endovascular coiling for the treatment of recurrent cerebral aneurysms after surgical clipping are unclear. Here, we report six cases of aneurysm embolization for recurrent cerebral aneurysms after surgical clipping between 1998 and 2016 in our hospital. Complete obliteration without any complications was achieved in four of six cases. Our results suggest that time intervals from initial treatment to recurrence and rupture are approximately 5 years and 15 years, respectively. Endovascular coil embolization is a safe and effective treatment for recurrent cerebral aneurysms. Long-term follow-up is mandatory for patients who have undergone surgical clipping.