<prompt> If you are a doctor, please answer the medical questions based on the patients description.Tan colored stools and diarrhea for 6 weeks. I have been on Vicoden for 5 months until the last 2 weeks due to cutting off 2 fingers, so also a couple of antiobitics during that time. Cipro and Amox. What I have had done: metabolic panel, so ALP, ALT, AST, Lytes, Glucose, BUN, GFR, CBC, food allergy testing, H Pylori, C Difficile toxins, OP X2 - 2 weeks apart, Giardia Elisa, Stool culture X2 , 2 weeks apart - all normal. Then a normal CT scan just completed. I am craving dairy and fat - and I am usually on a low fat diet, fish, vegetables etc. So I have an appt on Monday but I am at a loss. Questions; Would the CT scan show a gall bladder obstruction? Am I missing something? Something in the liver that the enzymes are not showing nor the CT scan? Thanks I would like an opinion on what I am maybe not seeing before I go to the Doctors.  <response>: Hi.to answer your question, the test with the highest sensitivity in showing gallbladder or any hepaticopancreaticobiliary tree obstruction if your primary consideration are stones, is ultrasound; MRCP if tumor lesion is considered. But prior to doing so, it is best if you consult with a doctor first, preferably a general surgeon or a gastroenterologist, for physical examination and clinical evaluation. Other diagnostics such as bilirubin, liver function tests, etc. and management medical andor surgical if indications are found will be directed accordingly. Hope this helps. Good day!! Chat Doctor. 