Ultrasonogram of liver of a five-year-old sheep viewed from 9th intercostal space with a 5-MHz convex transducer showing a periportal cyst with ill-defined borders and anechoic content containing echogenic septa (white arrows) (note narrowing with hyperechogenicity of portal vein). CVC, caudal vena cava; PV, portal vein; Ds, dorsal; Vt, ventral