Perigraft seroma (PS) is a postoperative complication occurring after prosthesis placement.A 48-year-old man who had previously undergone visceral debranching bypass surgery as a part of hybrid thoracoabdominal aortic repair was referred to our hospital because of vomiting.Contrast-enhanced computed tomography revealed AC Adapter a duodenal obstruction resulting from compression by a PS located around the bypass graft Dog Grooming and extending to the right renal artery.Endovascular relining of the visceral bypass graft using a covered stent was performed, resulting in immediate resolution of the duodenal obstruction and shrinkage of the PS.Endovascular repair can be considered as an effective option for treating a PS.