Antemortem diagnosis of cardiac metastasis is rarely observed. A case of cardiac metastasis from colon adenocarcinoma is reported. The diagnosis of an intracavitary mass of the right atrium and vegetant mass of the tricuspid valve was possible by two dimensional transthoracic echocardiography. The authors make a brief reference to the clinical and imaging features of secondary cardiac tumors, with special emphasis on echocardiography.