Malignant rhabdoid tumor of the heart in an infant

A 6‐month‐old infant presenting with pericardial effusion was found to have a malignant rhabdoid tumor of the heart. As visualized by two‐dimensional echocardiography and subsequently by contrast‐enhanced computerized axial tomographic scanning, the tumor arose from the left ventricular free wall and grew into the pericardial space. Despite two courses of single‐agent chemotherapy with doxorubicin, the child died 3 months later. This is the first reported case of malignant rhabdoid tumor of the heart, and the fifth case of a primary cardiac malignancy in an infant.