Comparison of ultrasound and E.R.C.P. in the detection of the cause of obstructive biliary disease

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Abstract
The value of ultrasound (US) in determining the cause and site of biliary obstruction was critically evaluated and compared to endoscopic retrograde cholangiography (ERCP), in a prospective study performed on 120 consecutive patients. The final diagnosis was based on surgery, endoscopic retrograde cholangiography or a combination of other examinations. Ultrasound successfully differentiated obstructive from non obstructive jaundice in 96% of the patients, comparing well with the results ERCP. US correctly defined the cause of obstruction in 71% of the patients with ductal stones, in 90% of the patients with tumoural bile duct obstruction, but only in 59% of the patients with chronic pancreatitis.

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