Tumors of distal part of a bile duct were accompanied by significant increasing of gall bladder size. Surface area of gall bladder varied from 32 sq.cm. to 57 sq.cm. Dilation of intrahepatic ducts was registered in 57% of patients. Diameter of intrahepatic bile ducts ranged 0.2-0.8 cm, of a common bile duct – 0.7 – 1.7 cm. Concomitant concrements in a gall bladder were revealed in 14.3% of patients. Localization of a tumor in intramural part of a common bile duct caused an obstruction of major pancreatic duct entrance, which was dilated in 71.4% of patients. Diameter of major pancreatic duct varied from 0.1 to 0.8 cm.

Informativity of three-dimensional Bioplasm 9d nls-study exceeded informativity of ultrasound research (see Table 3).