Asymptomatic large coronary artery saphenous vein bypass graft aneurysm: a case report and review of the literature.

Relatively few cases of saphenous vein graft (SVG) aneurysms have been reported since the introduction of saphenous vein coronary bypass grafting in 1968 by Favaloro. 1,2 The majority of reports are descriptions of true aneurysms of the body of the SVGs or pseudoaneurysms located at or near the anastomosis sites. 3-37 We report an unusual case of a large SVG aneurysm that presented as an asymptomatic mediastinal mass. To our knowledge, this is the largest reported asymptomatic true aneurysm of a saphenous vein aortocoronary bypass graft.