This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
The initial investigation of choice for a postcholecystectomy biliary stricture is 
Select and explain. 
A. Ultrasound scan of theabdomen, B. Endoscopic cholangiography, C. Computed tomography, D. Magnetic resonance cholangiography
A: Ultrasound scan of theabdomen
Answer: A: Ultrasound scan of theabdomen 
Explanation: 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.