Images in cardiology: Pericardial yolk sac tumor presenting as cardiac tamponade in a 21-month-old child.

FIG. 1 Two-dimensional echocardiogram in parasternal long-axis view, showing a large mass (T) at the base of the heart with global pericardial effusion (PE). LV = left ventricle. FIG. 2 Single axial image from spiral computed tomography of the chest shows a large, heterogeneous enhancing mass (M) located anterior and to the right of the cardiac structures. It extends towards the right hilum (H) with atelectasis of the left lower lobe of the lung (LL). LA = left atrium, RV = right ventricle.