The typical liver cyst sonogram shows a round or oval echogenic area with a thin, homogeneous hyperechoic wall, smooth inner wall, and a clear demarcation between the outer wall and the surrounding normal tissue. The cyst is posteriorly echogenic, and small cysts may have lateral acoustic shadowing in the lateral wall, or in some cases, only the anterior and posterior walls of the cyst are echogenic on the sonogram. Cysts can be single or multiple, sometimes with irregular morphology, and neighboring cysts can communicate with each other. Cysts are usually single-roomed, and the sonogram of multiroomed cysts shows a slender band separating the cyst cavity, and usually this band echo represents the septal echogenicity within the cyst. If the cyst is combined with infection and hemorrhage, the sonogram may show a floating diffuse punctate weak echogenicity and the cyst wall may show thickening changes.