Two-dimensional echocardiography: parasternal long axis image obtained in a 16-year boy shows a huge hyperechoic mass (*) in the left atrium (LA) which was significantly hindering the flow of blood to the left ventricle through the mitral valve. RV—Right Ventricle; IVS—Interventricular Septum; LV— Left Ventricle; LA—Left Atrium; Ao—Aorta.