<s>[INST] I have had MRCP scan and got gallstones. But also found mildly dilated intraheptic biliary ducts in segment 8 and 4a returning into normal calibre of the right hepatic duct and some hypertrophy of left lobe of liver. What does this mean? I have pain in right area under the ribs and back / shoulder pain. But also gas / lower abdomen pain and floating stools. What could be the cause? [/INST] Hi and welcome to HCM. It can be caused by gallbaldder or live rissue and this is most common cause of such pain. dilated intrahepatic ducts are seen most commonly in biliary tree obstructtion due to stones but also any kind of liver fibrosis or hepatitis can cause it as well. rarely tumors are diagnosed after such mri findings. So you should do cholecystectomy if pain persist and have frequent hepatologist follow up.Thanks for the query. Wish you good health. Regards </s>