Mine is also dilated at 1.1 as seen in a CT scan. The radiologist proposed follow up with an MRCP. My GI doc thinks it is due to having my gallbladder removed 11 years ago so did not order further testing. However I do have bile reflux and take Colesevelam 2x a day. I try to sleep with head elevated. I also have chronic pancreatitis so often am nauseous and have abdominal pain. It’s so hard to get to the root cause of health issues. Recently I did genetic testing for pancreatitis and told I’m a carrier of the cystic fibrosis gene and likely have atypical or non classic cystic fibrosis. More genetic testing will be done. Someone mentioned rapid unintentional weight loss which I also have experienced and am in the underweight category now. I have tried 2x to get into Mayo in the last couple of years but sadly turned down both times. Best of luck to you in your journey for answers.