Paracardiac masses caused by a right coronary artery aneurysm and a saphenous vein graft aneurysm

Two unusual cases of large aneurysms, one located in the native right coronary artery and the other in a saphenous vein graft, are reported. Their size and mode of presentation as asymptomatic paracardiac masses on chest x-ray films make them unique. It is proposed that these entities be considered as part of the differential diagnosis of paracardiac masses.