You may want to discuss an MRCP with your doc. It will only give you a 'view' and may not give you any answers, but it's a start. If all else fails, an ERCP may be the only way to go. If an ERCP is done, please make sure it with done WITH manometry. If done with manometry, they can measure the pressures in the sphincter and duct, and if they are found to be elevated a sphincterotomy can be done. It shouldn't be done if the pressures aren't raised, so please also make sure that the doc knows that you understand the importance - meanwhile read up on SOD (sphincter of Oddi dysfunction) and the use of manometry. Also talk to the doc about stenting after the ERCP. It can reduce the chances of post-ERCP pancreatitis.