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ROC curve of the KL-6 concentration of pancreatic juice for pancreatic malignancy. The cut-off level of KL-6 determined from the receiver-operating characteristic curve for differentiating pancreatic malignancy from benign stricture of the main pancreatic duct and IPMN is 16 U/mL. The AUC of the KL-6 analysis is 0.752.
