Ultrasonogram of the enlarged pylorus. Ultrasonogram of the enlarged pylorus in a Swiss Braunvieh cow with lymphosarcoma of the abomasum. The pylorus contains ingesta and the thickness of its wall is increased. The image was obtained from the cranial right flank at the level of the costochondral junction using a 5.0-MHz convex transducer. 1 Lateral abdominal wall, 2 Thickened wall of pylorus, 3 Ingesta in pylorus, Ds Dorsal, Vt Ventral.