Fig 1. (A) Transthoracic echocardiogram showed a RV mass at the basal level of the interventricular septum; (B~D) Transesophageal echocardiography showed the attachment closely connected with the tricuspid tendinous cord （yellow arrows）and adjacent to the aortic root; (E) Cardiac magnetic resonance imaging showed a soft tissue signal nodule; (F) PET showed no obvious abnormal increase of metabolism in the right ventricle; (G) CTA showed a RV filling defect; (H) Thoracoscopy revealed the mass (the white arrows indicated its outline) and its attachment adhered to tendinous cord (little yellow arrows) of tricuspid septal valve.