The diagnosis of bile duct carcinoma currently depends largely on radiographic imaging. Imaging provides certain information that is necessary for determining operability and the proper surgical procedure to be employed. In an early stage of bile duct carcinoma, elevated serum enzymes may be the only abnormality detectable, but once the mass has grown to cause sufficient stenosis along the biliary tract, serum bilirubin starts to rise. Differentiation of intra‐ and extrahepatic cholestases is the primary task of the gastroenterologist. The site and nature of the obstructing lesion must then be determined by means of imaging. This article deals mainly with the diagnosis of dile duct carcinoma through imaging, excluding the endoscopic procedure.
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Okuda et al. (1988) studied this question.
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