A patient with history of choledocholithiasis presents with elevated conjugated bilirubin. Ultrasound reveals a dilated biliary system upto the terminal pa. In case of suspicion of an ampullary obstructive calculus which of the following investigations would be most sensitive?: (A) PTC, (B) MRCP, (C) Xray abdomen, (D) Endoscpic USG
Answer is D. EUS- Most sensitive method to detect ampullary stones