[Surgery for Right Coronary Artery Ostium Thrombus Occlusion:Report of a Case].

We experienced a rare thrombus occlusion at the orifice of the right coronary artery in a patient with chronic atrial fibrillation and a history of cancer treatment. The thrombus plugged the right coronary artery, orifice accompanying protrusion into the aorta. There was a risk of a systemic embolism if it scattered. By utilizing computed tomography (CT) scan, we were able to avoid subsequent systemic embolism and make the diagnosis. We selected thrombectomy by open heart surgery to avoid subsequent embolism. We report this case with a review of the literature.