Dilated Common Bile Duct is Commonly Associated with Main Duct Intraductal Papillary Mucinous Neoplasm of the Pancreas

Abstract

Abstract Background: Dilation of common bile duct (CBD) is mostly pathological and mainly occurs secondary to mechanical causes. We aimed to explore the prevalence of CBD dilation in Intraductal Papillary Mucinous Neoplasms of the pancreas (IPMN-P) patients referred to EUS. Methods: a retrospective study of all patients who had an EUS diagnosis of IPMN from 2011 to 2019 at Galilee Medical Center were extracted. Control group including patients with other types of pancreatic cysts. Results: Overall, 158 patients were included in the study, 117 patients (74%) diagnosed with IPMN (group A) and 41 patients (26%) diagnosed with other pancreatic cysts (group B). CBD dilation was significantly correlated with IPMN patients as compared to group B (OR 3.8, P=0.01). Classifying IPMN to subtypes, only main duct-IPMN significantly correlated with CBD dilation (OR 40, P < 0.0001), and a trend for significance with mixed-IPMN (OR 3.6, P=0.06). Adjusting for confounders (resected gallbladder and age), main duct-IPMN remained significantly correlated with CBD dilation (P<0.001). Conclusion: main duct-IPMN was significantly correlated with dilated CBD. Assessment of the pancreas is warranted in encountered cases of dilated CBD without obvious mechanical cause.