Pseudoaneurysm of the common femoral artery is a well-known complication after surgical or invasive intervention into the femoral arteries. This complication usually presents as pulsatile swelling of the groin soon after the intervention. However, we report a rare case in which a late-onset pseudoaneurysm of the left common femoral artery presented alongside lower extremity edema without swelling. An 88-year-old man presented to our clinic with left lower extremity edema but without swelling. He had previously undergone cardiac surgery that used the femoral artery for extracorporeal perfusion; during this operation, bilateral great saphenous veins were harvested as grafts for coronary artery reconstruction. After duplex ultrasound examination and enhanced computed tomography, a 50 mm pseudoaneurysm of the left common femoral artery was diagnosed (resulting from a burst suture), and surgical repair and resection of the pseudoaneurysm was performed. The entry of the pseudoaneurysm was a 6 mm-diameter defect of the arterial wall on the right side of the common femoral artery; this location was the endpoint of the suture applied in the previous surgery. The entry site was repaired using a bovine pericardium xenograft patch (XenoSure, LeMaitre Vascular, Inc., Canada). The probable reason for the rare presentation was the position of entry on the lateral wall, and the late onset was likely due to the delayed rupture of the suture in the common femoral artery. XenoSure was useful when the great saphenous vein could not be used as a biological graft. Additionally, it was adaptive and easy to manipulate during the surgery.