Cardiac tumors may be primary or secondary and malignant or benign. Of all primary cardiac tumors 75% are benign and 25% are malignant. Of the benign tumors in McAllister and Fenoglio's observations of 533 primary tumors,4 24.4% were myxomas, 8.4% were lipomas, 7.9% were papillary fibroelastomas, and 6.8% were rhabdomyomas. Fibromas, hemangiomas, teratomas, atrioventricular nodal mesotheliomas, granular cell tumors, pericardial cysts, and bronchogenic cysts accounted for fewer than 5% each. In the malignant group, angiosarcoma (7.3%) and rhabdomyosarcoma (4.9%) were the most frequent, whereas mesothelioma, fibrosarcoma, malignant lymphoma, extraskeletal osteosarcoma, neurogenic sarcoma, malignant teratoma, thymoma, leiomyosarcoma, liposarcoma, and synovial sarcoma were rare conditions. Secondary tumors are more frequently carcinomas than sarcomas, but all types of tumors may be found.