Cardiac Inflammatory Myofibroblastic Tumor in a Young Male Patient With Myopericarditis

An 18-year-old man without a medical history was admitted to our hospital with pericarditic thoracic pain, fever, leukocytosis, and elevated cardiac enzymes. ECG showed a second-degree atrioventricular block, and transthoracic echocardiogram revealed a severe pericardial effusion (30 mm; Figure 1A). Because of signs and symptoms of cardiac tamponade, subxifoid pericardiocentesis was successfully performed, and a cloudy liquid was obtained. Empirical antibiotics were prescribed despite blood. Pericardial effusion and urine cultures were sterile because of the biochemical characteristics of the pericardial effusion. Viral serologies and Mantoux were also negative, and autoimmune disorders were ruled out. Cardiac magnetic resonance demonstrated an epicardial 21-mm-thick solid mass with homogeneous aspect, starting in the left ventricle and extending …