Jellyfish in the Heart
A 41-year-old man with a partially cystic cardiac mass was referred to our institutions. About 17 years previously, he had undergone the excision of a lipoma in the left popliteal region. The patient had been well until 3 to 4 months earlier, when dyspnea on exertion developed.
Two-dimensional echocardiography (Figure 1A and 1B), computed tomography (Figure 2A and 2B), and magnetic resonance imaging (Figure 3A and 3B and Movies I–3 in the online-only Data Supplement) displayed a patchy lobulated epicardial mass (transversal diameter, 7 cm; thickness, 4 cm) near the left cardiophrenic angle, partially occupying the left ventricular chamber.