- An ultrasound of the RUQ should be performed in all cases to assess for biliary stones and obstruction
- After negative routine work-up for biliary aetiology, endoscopic ultrasonography (EUS) is recommended as the first step to assess for occult microlithiasis, neoplasms and chronic pancreatitis
- If EUS is negative MRCP is advised as a second step to identify rare morphologic abnormalities
