( A ) Transthoracic echocardiography. Long axis view demonstrates the large echogenic left ventricular mass with adherence to the free wall and partial obliteration of the left ventriclar cavity without signs of left ventricle outflow tract obstruction. ( B ) Cardiac magnetic resonance imaging. CINE steady-state free precession image in the four-chamber view during systole shows the large left ventricular mass marked with an arrow extending through the myocardium of the free wall and the apex into the pericardium. ( C  and  D ) Cardiac magnetic resonance imaging. CINE steady-state free precession image in the short axis during diastole ( C ) depicts the large intraventricular mass indicated by an arrow traversing the free left ventricular wall, while there is extensive left ventricular obliteration at systole ( D ). ( E ) Cardiac magnetic resonance imaging. CINE steady-state free precession image in the three chamber view shows undisturbed flow in the left ventricular inlet and outlet despite the large left ventricular mass marked with an arrow. ( F  and  G ) Cardiac magnetic resonance imaging. T 1 -weighted fast spin echo image and triple inversion recovery image in the short axis showing the fat-isointense mass (marked by arrow) in the left ventricular crossing the myocardium. ( H ) Histology. The biopsy shows mature univacuolar adipose tissue interspersed with fibrous septa (scale bar: 200 μm). AV, aortic valve; LV, left ventricle; MV, mitral valve.