Preoperative assessment of congenital XXXX dilatation using intraductal US.

@entity1 @entity5 @entity384 @entity1157 @entity1125
BACKGROUND: Although congenital @entity1157 dilatation is frequently associated with @entity1125 , conventional cholangiography often does not demonstrate small @entity5 . This is the first prospective study of the value of intraductal ultrasonography (US) in the examination of the extrahepatic bile ducts in @entity1 with congenital @entity1157 dilatation. METHODS: Intraductal US via a transpapillary route was used in consecutive @entity1 with congenital @entity1157 dilatation. A 2.0 mm diameter, 20 MHz frequency catheter probe was used. The images were correlated with the results of histologic examination of the resection specimens. RESULTS: Intraductal US was performed successfully via the transpapillary route in 8 of 10 @entity1 . In the other 2 @entity1 , the percutaneous transhepatic route was used. In the 6 @entity1 with cylindrical dilatation, intraductal US demonstrated the entire extrahepatic @entity1157 . In 1 @entity1 , it showed a @entity1157 cancer not demonstrated by cholangiography. In 2 of the 4 @entity1 with @entity384 , intraductal US did not demonstrate the entire extrahepatic @entity1157 because of the low penetration depth of the probe. Percutaneous transhepatic cholangioscopy was required in these @entity1 . CONCLUSIONS: Intraductal US is useful for demonstrating @entity5 in the extrahepatic bile ducts in @entity1 with @entity384 .
