A 77-year-old woman, who had undergone coronary stent implantation at the proximal left anterior descending artery 30 months ago, presented with a large anterior left ventricle (LV) aneurysm. Chest X-ray revealed a soft tissue density measuring 7×5 cm, merging with the left heart border (Figure 1). Computed tomography (CT) scan (Figure 2) and echocardiography (Figure 3) showed a very large aneurysmal dilatation of the anterior wall of the mid cavity of the LV without any thrombus. The patient underwent LV aneurysmectomy. A part of the huge aneurysm, approximately 3 cm in diameter, showed dense adhesion with the pericardium (Figure 4A). The surrounding part of the adhesion was rather thin, almost translucent, as if there was no sign of endomyocardial layer (Figure 4B). As the large pseudoaneurysmal change developed without well-defined edges, the myocardial layer surrounding the beginning of the aneurysmal sac was most likely pulled outward slightly along with the growing outpouching. The large anatomical defect was closed with Dacron patch (Figure 4C). Postoperative CT scan showed the successful exclusion of the pseudoaneurysm and reconstruction of the LV (Figure 5). She was discharged on postoperative day 11 with no neurological or cardiovascular sequelae.