Table 2.

Ultrasonography features for the diagnosis of monocytic diseases of the liver

	Simple cyst	Cystic echinococcosis	Alveolar echinococcosis	Cystadenoma and cystadenocarcinoma
Border	Sharp and smooth	Laminated	Irregular	Irregular
Shape	Spherical or oval	Round or oval	Irregular	Round or oval
Echo pattern	Anechoic1	Anechoic or atypical2	Hyperechogenic outer ring and hypoechogenic centre	Hypoechogenic with hyperechogenic septations
Appearance	No septa	Multiseptated	Multivesicular	Septated and/or solid structures (papillary projections)
Wall	Strong posterior wall echoes			Wall enhancement
Posterior acoustic feature	Relative3 accentuation of echoes		Dorsal shadowing (calcified areas)	Dorsal shadowing (calcified areas)

¹Fluid-filled cavity;

²Snowflake-like inclusions or floating laminated membranes;

³Compared to echoes at a similar depth transmitted through normal adjacent hepatic tissue.