FIGURE 1 Imaging examination. (A) X-ray imaging revealed cardiomegaly, with diffuse bilateral increased pulmonary opacity; (B) Following treatment for one month (one-week post-surgery), X-ray imaging revealed mild cardiomegaly less severe than previously noted with the disappearance of lung infiltrates; (C) Echocardiography revealed a hypokinetic left ventricle with an ejection fraction of 38.4% and fractional shortening of 18.1%, the left ventricular diastolic diameter (LVDd) was 34.8mm; (D) 24 days after operation, echocardiography exhibited normal cardiac function with an ejection fraction of 60.4% and fractional shortening of 30.9%; the LVDd had reverted to 27.2mm; (E-F) MRI revealed an inhomogeneous quasi-circular 48.7 mm × 49.5 mm × 52.8 mm soft tissue mass.