[Asymptomatic lithiasis of the common bile duct: diagnostic difficulty and essentiality of intraoperative cholangiography].

: Biliary lithiasis is a widespread pathology the diagnosis of which, following the introduction of ultrasonography, is increasingly easy. The frequent possibility of association between gallstones and choledocholithiasis, demands pre- or intraoperative recognition. The inadequacy of ultrasonography in excluding lithiasis of the common biliary tract with certainty, notwithstanding its other unquestionable advantages, and the disproportionate costs and risks of other investigations (cholangiography, ERCP, ecc.) which are such as to discourage routine use, confirm the role of operative cholangiography in the diagnosis of asymptomatic choledocholithiasis, so permetting its treatment. Personal experience of 100 consecutive cases of gallstones which showed fully 10 of them to be negative to preoperative investigation were found to have lithiasis of the common biliary tract.