[Spontaneous internal biliary fistula. Review of the literature]

The literature concerning internal biliary fistula is reviewed. Its frequency in autopsy ranges from 0.4 to 5%, and in biliary tract operations from 0.4 to 7%. A general approach has to be established in order to obtain a diagnosis, and an individually oriented treatment provided. Emphasis is placed on certain measures of treatment and complications. The most severe complications are cholangitis (7.5%) and gall stone ileus (2% to 6%).