Pictorial review of hepatic echinococcosis: Ultrasound imaging and differential diagnosis

Table 3 Sonographic features of hepatic alveolar echinococcosis

Course of disease	EMUC-US	Sonographic features
Infiltration stage	Hemangioma-like/metastasis-like	Fundamental sign: A solid, heterogeneously echoic mass with unclear boundaries and an irregular shape
Calcification stage	Hailstorm/ossified	Special sign: A heterogeneously echoic mass with punctate, gravel-like, and small circular echogenic calcifications inside, accompanied by a posterior acoustic shadow
Liquefaction stage	Pseudocystic	Special sign: A heterogeneously echoic mass with large, irregularly shaped dark areas, creating a “lava-like” appearance, referred to as the “cavity” sign

EMUC-US: Echinococcosis multilocularis Ulm classification-ultrasound.