Cardiac extension of Wilms' tumor.

Two children who were brought to the Istanbul Children's Hospital with congestive heart failure caused by extension of Wilms' tumor to the right atrium are presented. In both cases a large mass was noted in the right atrium by two-dimensional echocardiography. The tumors were successfully removed at open heart surgery, and chemotherapy and radiotherapy were started postoperatively. The patients are both alive and symptom-free; one, three and a half years and the other two years postoperatively.