[Patient with right-sided epigastric pain and "negative" ultrasound].

In most cases pain in the right upper abdominal quadrant is of biliary origin. Diseases of the biliary system are often visualized by ultrasonography; however, a negative test does not rule out a biliary cause. Moreover, a number of several non-biliary diseases have to be considered. Patient history, physical examination and laboratory findings determine the further diagnostic approach and include radiologic (i.e. CT/scintigraphy) and/or endoscopic (upper GI endoscopy, ERCP) examinations. In difficult diagnostic situations specialized diagnostic tools may be indicated (e.g. manometry in suspected dysfunction sphincter of the Oddi.