EFFICACY OF HEPATOBILIARY SCINTIGRAPHY IN DEMONSTRATING CHOLANGIO-COLIC FISTULAS IS FORMATION OF INTERNAL BILIARY FISTULA RELATED TO EXTERNAL LEAK CLOSURE

The authors present four cases of internal biliary fistulae (IBF) iden tified on hepatobiliary scintigraphy, All of the cases share common hi story of external biliary leak closure, Scintigraphy in all four cases showed a similar pattern of direct visualization of transverse colon without any significant small bowel activity, This suggests an increas ed frequency of IBF formation in cases with external fistulous tract c losure, Retrospectively, it appears that spontaneous closure of extern al leak may be pathological consequence of formation of IBF involving hepatic flexure.