Fig. 1

Preoperative images. A Transthoracic echocardiogram at the right after laser catheter ablation and the time of hospitalization this time. The latter demonstrates a giant mass in the right atrium (arrow). B Contrast-enhanced CT reveals the tumor has an irregular surface, heterogeneous contrast-enhanced effect, and vascular structures within. C Cardiac magnetic resonance imaging (CMR) exhibits heterogeneous high T1 signal. D CMR reveals a low-to-high T2 signal