LAUSR

Coronary artery aneurysms (CAA) are rare, commonly involve the right coronary artery (RCA) andmay presentwith anterior ST segment elevation, and compression of the pulmonary and left main coronary arteries. We present an image of a CAA presenting as a right paracardial mass. A 63-year-old male underwent an RCA stent implantation for an inferior wall myocardial infarction. Three months later, a follow-up transthoracic echocardiogram revealed a 4-5-cm mass adjacent to the right atrium and ventricle. Cardiac magnetic resonance imaging confirmed a 4-cm well-circumscribed cystic mass in the atrioventricular groove (Figure 1). At the time of surgery, themass was noted to be a giant RCA aneurysm (Figures 2 and 3). The patient was placed on cardiopulmonary bypass, the aneurysm was ligated, and a saphenous vein bypass graft was performed to the distal RCA. The patient tolerated the procedure well and remains symptom free 18 months following surgery. CONFLICTS OF INTEREST