Pictures showing open right atrium and gross finding of cardiac mass. (A) The right atrium was open by cardiac incision. Cardiac masses invading the myocardium were seen. One of them protruded into the right ventricle through the tricuspid valve. However, the inferior vena cava was clear. Cardiac masses were also seen in the right ventricle and occupied 90% of the right ventricle lumen. All masses on the operation field were excised. (B) All materials from excised masses were collected. They were originally torn to pieces because the cardiac mass was so friable. Therefore, we fitted them together into one.