Rapid Progression of a Saphenous Vein Graft Aneurysm Followed as a Thymoma

A 76-year-old man who had undergone 2-vessel coronary artery bypass graft (CABG) operation 21 years ago was diagnosed with myasthenia gravis and had been under follow-up for the past 3 years. An anterior mediastinal mass was detected with chest x-ray, and he was consulted by a thoracic surgeon for a possible thymoma. Computed tomography (CT) scans revealed that the mass could be an aneurysm originating from saphenous vein graft (SVGA) or from the aorta. The patient was referred to the cardiovascular surgery department.The results of his physical examination were normal. ECG showed R-wave progression loss in leads V1 through V3 and sinus rhythm. Echocardiography showed mild apical hypokinesia with an ejection fraction of 57%. Although there was …