RESUMO
Fascioliasis is a cosmopolitan parasitic disease. The development of some diagnostic imaging methods such as ultrasonography (US) and endoscopic retrograde cholangio-pancreatography (ERCP) have provided the opportunity of detecting the presence of the parasite in the gall-bladder and in the extra-hepatic biliary tract. Four cases of fascioliasis in the biliary tract are shown, in which the ultrasonographic findings suggested a diagnosis of fascioliasis which was later confirmed by biliary drainage and/or stool culture. When there is no clinical evidence of parasitism, ultrasonography may help to assume the presence of the parasite. The ERCP is useful to confirm the location of the trematode in the extra-hepatic biliary tract. Biliary tract fascioliasis may present as a cholestatic syndrome.