basing on a patient material consisting of 28 patients with tumours in the region of the extrahepatic bile ducts , the following criteria are examined which govern the demonstration of tumour obstructions by means of the computer tomogram : extent of widening of the bile ducts , assessment of stenosis or complete obstruction of the bile ducts and demonstration of the structure of the tumorous tissue and of the tumorous infiltration into the adjacent tissues .
C0345913
tumours
C0005400
bile ducts