Abstract
A 61-year-old man underwent endovascular aneurysm repair(EVAR) for abdominal aortic aneurysm with maximum diameter of 88 mm.Type II endoleak from lumbar artery without no significant aneurysmal enlargement appeared at 6 month after the procedure. However, redilatation of aneurysm with persistent type II endoleak was observed in the next 6 months. Open conversion was successfully performed with infrarenal aortic clamping and preservation of the distal part of the endograft. In Japan, there have been a few case-reports of open conversion after EVAR with persistent type II endoleak. Because large aneurysmal diameter before EVAR is one the risk factors for the reoperation, open surgery is preferable for good risk patients with significantly large aneurysm.