in reply to @rvan8890 I have the same problem, with dilation of my bile ducts in my liver and pancreas, along with some small cysts. My hepatologist is not concerned, but has suggested the EUS along with some other procedures. Do you have a good gastroenterologist who can guide you? I have no idea what causes the cysts, and when I have asked the question, I received a "non answer." The dilation can be caused by a number of things, including autoimmune disorders, which have been ruled out in my case. The dilations have stabilized so I am not going to worry about it, even though one of the side effects is having zero appetite, and as a result I have lost 40 percent of my weight. I just eat when I feel like it or have to, like yesterday when I thought I was going to pass out after walking a mile. Go figure.
Best of luck. Maybe get a good hepatologist to help you with your concerns.