<human>: hi there got a query regarding a case study: 40 year old male presented with upper abdominal pain and occasional nausea and vomiting. the pain was particularly severe after a fatty meal and the patient noted dark urine and light coloured stools. what could be the cause?
<bot>: Hi. Thanks for a good history. This is classical of an obstruction in the bile ducts, either by stone or any other cause. I would advise ultrasonography of abdomen, blood tests including those of liver function tests, kidney function tests, Serum lipase and amylase. This will give the site of obstruction and its effects. You may need an MRI study, ERCP and further diagnostic and therapeutic procedures.