Hepatic echinococcal cyst

Panel A: ERCP demonstrating external compression of the hepatic duct by the cyst. Panel B: CT scan shows a complex septated cyst and a heavily calcified daughter-cyst in the right hepatic lobe (arrowhead), in a 38-year old man. Panel C: Post resection. Panel D: Histologic appearance of a degenerated cyst containing fragments of the germinal membrane (hematoxylin and eosin, original magnification: x 2000).