Fig. 1

a On chest scan, a spherical/flat mound-shaped mass growing prominently into the left atrium with a broad base attached to the posterior wall of the left atrium is seen; b + c on enhancement scans, the mass is moderately enhanced, and trophoblastic vessels are seen within it. d On abdominal scan, a mass-like thickening with a cauliflower-like shape growing into the gastric lumen is seen in the gastric wall on the side of the gastric lesser curvature; e + f On enhancement scans, the mass moderately but progressively strengthens with the interrupted inward lifting of the mucosal line and thickening of the submucosal edema. Multiple lymph nodes are seen next to the right gastric vein in the lesser curvature of the stomach