[Sonography for the demonstration of investigation of dilatation of the main pancreatic duct (author's transl)].

Amongst 284 sonographic examinations of the pancreas, dilatation of the main duct was found in nine instances. Six cases were due to chronic pancreatitis and three to tumour. In all the six cases due to chronic inflammation, the cause of the dilated duct could be demonstrated sonographically. Only one of the tumours was recognised. Simultaneous dilatation of the biliary tree was found in inflammatory and malignant lesions.