A rare case of apical hypertrophic cardiomyopathy with massive left ventricular endomyocardial calcification was studied with MR. The extent of the hypertrophy was clearly demonstrated, enabling accurate estimations of myocardial mass and volumes. Furthermore, an apical calcification was found and its volume estimated. In this case, MR gave the same information that was available by echocardiography, CT, and cardiac catheterization without the disadvantages of these methods.