The case of a 13-year-old boy with a tricuspid valve myxoma and coronary artery occlusion and aneurysms suspected to be caused by Kawasaki's disease is presented. Simultaneous extirpation of the myxoma and coronary artery bypass grafting to the left anterior descending artery using the left internal mammary artery was performed. His postoperative course was satisfactory. Coronary artery bypass grafting in a child is also discussed.
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