[Morphological lesions of the choledochus studied with combined percutaneous transhepatic cholangiography and hypotonic duodenography].

Twenty two patients obstructive jaundice were investigated by combined fine needle percutaneous cholangiography and hypotonic duodenography. The association of the two techniques enables prompt localization of the site of obstruction and definition of the nature of the lesion. It proves to be of particular use in the differential diagnosis of carcinoma of the head of the pancreas, carcinoma of the distal choledochus and carcinoma of the socalled choledochoduodenal junction.