Ultrasonogram of enlarged lymph nodes. Ultrasonogram of two markedly enlarged lymph nodes caudal to the reticulum in a Swiss Braunvieh cow with lymphosarcoma of the abomasum. The image was obtained from the left paramedian region lateral to the sternum using a 5.0-MHz convex transducer. 1 Ventral abdominal wall, 2 Diaphragm, 3 Reticulum, 4 Anterior ventral blind sac of rumen, 5 Lymph nodes, Cr Cranial, Cd Caudal.