We report a case of an 80-year-old man, who underwent an endovascular repair of an abdominal aortic aneurysm. Surgical access was obtained from both common femoral arteries, and the procedure was uneventful. One month computed tomography (CT) follow-up was without findings. Two months after endovascular aortic aneurysm repair (EVAR), the patient complained of claudication on the left side associated with persistent pain, rigid swelling on the left groin area, and occasional febrile episodes within the last month. Ultrasonography showed fluid collection, and needle aspiration gained pus. It was thought to be local postsurgical infection, and the patient got antibiotics, but he did worse. One month later, computed tomography revealed focal left common femoral artery (CFA) stenosis, edematous appearance of subcutaneous soft tissue in the left groin area, and anterior displacement of the ipsilateral CFA in relation to the right side. Surgical exploration of the region revealed retained, uncapsuled, and partially destroyed surgical gauze, lying just behind the left CFA, which was removed.