This is a non-randomized natural history protocol in which patients undergoing surgery or endoscopy for suspected/ diagnosed pancreaticobiliary strictures are assigned to a) control (chronic pancreatitis, no pancreatic neoplasm, primary sclerosing cholangitis), b) non-carcinoma (bile duct stones, papillary stenosis, ), c) carcinoma non-pancreatic (ampullary and distal bile duct or cholangiocarcinoma) and d) pancreatic ductal adenocarcinoma (pancreatic cancer.
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Sensitivity and specificity of biomarkers in the diagnosis of cancer
Timeframe: one year