An intracardiac malignant lesion was found in a 28-year old male patient following orchidectomy for an advanced germinal tumour of the testicle. Although the patient is under chemotherapy, the neoplastic thrombus will be removed by surgery. Heart metastases are uncommon. When they do occur, they are usually secondary to locoregional extension and limited to the pericardium or myocardium. Endocardial or intracavitary lesions are rare, but can, in certain cases, be removed by surgery.