Fig 1 A: Transthoracic echocardiography showed a mass on the tricuspid ventricular surface, which protruded into the pulmonary valve during systole and many neoplasms attached to the tricuspid valve and its chordae tendineae(B ). C: Intraoperative resection of the masses.D: Pathological section indicated neoplastic lesion, which was considered as carcinoma.E: Immunohistochemical diagnosis was squamous cell carcinoma.F: PET-CT revealed increased glucose metabolism in the lymph nodes on the left side of the abdominal aorta and behind the foot of the left diaphragm. CK8/18:cytokeratin8/18,Ki67:Tumor proliferative antigen, P63,P16: tumor suppressor gene,CK5/6: cytokeratin5/6,PCK:Pan Cytokeratin.