Place de l’imagerie dans la prise en charge d’un obstacle sous hilaire et/ou de la convergence biliaire
The role of imagery in the management of a sub-hilar and/or biliary convergence obstruction
MRI plays a major role in the assessment of obstructed bile ducts. It makes it possible to determine the localization of the stenosis, specify its appearance, and to assess its etiology and operability. An effected convergence is a diagnostic challenge because histological confirmation is difficult in the majority of cases. Many malignant or benign, extrinsic or intrinsic etiologies can result in a stenosis of the hilum and/or convergence. MRI examination must thus be complete and associate MR cholangiography sequences and injections of contrast agent. The advantages and the limits of this technique must be well understood in order to avoid diagnostic errors.
biliary obstruction, MR cholangiography, intra and extrahepatic duct, Klatskin tumour