Figure 1. Ultrasonographic (A, B) and computed tomographic images, including the non-contrast (C), arterial (D), portal (E), and delayed (F) phases of the pyloric mass in case 1.

(A) The pyloric mass (arrows) is heterogeneous with hyperechoic areas in the centre. It is pedunculated in shape with ill-defined margins and protrudes into the gastric lumen. (B) Normal intestinal layering of the ascending duodenum (arrowhead) and thickened gastric wall associated with loss of layering (asterisk) near the mass (arrows) are noted. (C–F) The mass at the dorsocaudal portion of the pyloric antrum protruding into the lumen (white arrowheads) with mild homogeneous contrast enhancement. An enlarged gastric lymph node is identified (black arrowheads)