Fig. 6

Hepatic echinococcal cysts. a Type I cyst (WHO CE 1). Contrast-enhanced CT image of a unilocular echinococcal cyst in the right hepatic lobe, note the thicker anterior wall (asterisk). b Type II cyst (WHO CE 2). Contrast-enhanced CT image of a multilocular echinococcal cyst in the right hepatic lobe containing multiple daughter cysts in the periphery and mimicking a “rosette” (arrows). c. Type II cyst with contained ruptured (WHO CE 3). Axial US image shows floating membranes (“water-lily sign”) inside a cyst, consistent with rupture of the endocyst or daughter cysts. d Type III cyst (WHO CE 5). Fragment of an abdominal radiograph that incidentally showed a calcified hepatic hydatid cyst (arrow)