[Peroperative echography in hepatobiliary surgery].

Intra-operative echography provides precise information on anatomy of the liver and accurately locates hepatic tumours, even small ones, thereby improving the operative strategy. It is most useful in biliary surgery for detection and treatment of intrahepatic lithiasis. By displaying undetected hepatic metastases, echography of the liver is of considerable value in surgery of common tumours of the digestive tract.