The gold standard for diagnosis has been the invasive ERP, or endoscopic retrogradepancreatography;
诊断的金标准时有创性ERP，逆行性胰胆管造影。
2
Objective The value of endoscopic retrograde choledocho- pancreatography( ERCP ) to detect narrow- winding cystic duct and the effect of surgery were studied .