Endoscopic retrograde cholangiography in primary biliary tract carcinoma.

The appearance of primary biliary tract carcinoma revealed at endoscopic retrograde cholangiography in 16 patients and surgically confirmed, are classified as to location, type of margin of the lesion and degree of obstruction. Differential diagnosis towards infiltrating tumour of the gallbladder is considered. The conclusion is drawn that endoscopic retrograde cholangiography will establish the diagnosis of malignancy of the biliary tract with an acceptable certainty.