Fig. 1
From: The first meeting of the European Register of Cystic Echinococcosis (ERCE)
Schematic representation of the ultrasound classification of hepatic CE according to WHO-IWGE. CE1, fluid filled active unilocular cyst; CE2, active cyst with daughter vesicles; CE3a, transitional cyst with detached endocyst; CE3b, daughter vesicles in a solid matrix [although classified as transitional, this cyst stage is biologically active]; CE4, inactive cyst with solid matrix; CE5, inactive cyst with solid matrix and calcified walls