<prompt> The initial investigation of choice for a postcholecystectomy biliary stricture isUltrasound scan of theabdomenEndoscopic cholangiographyComputed tomographyMagnetic resonance cholangiography  <response>: The first step in the management of a postcholecystectomy biliary stricture is to undeake an immediate ultrasound scan of the abdomen.This will demonstrate whether there is intrahepatic extrahepatic dilatation secondary to strictures. After that, the anatomy needs to be defined by either an ERCP or MRCP. Reference: Bailey Love;s sho practise of surgery,25th edition, page no:1125. 