Biliary Papillomatosis

 Can be found in intrahepatic or extrahepatic ducts and range in size from a few mm (most common) to a few cm


image Tumors may secrete mucin: Wide-open ampulla of Vater with extrusion of mucoid material on ERCP


• CT and MR: Biliary ductal dilatation due to obstruction &/or increased mucin production
image Hypodense, nonenhancing intraductal mass on CECT

image T1 hypointense, mildly T2 hyperintense on MR

image Multiple round or oval signal voids within dilated ducts on MRCP with serrated appearance of duct wall

• US: Polypoid nodules without acoustic shadowing




TOP DIFFERENTIAL DIAGNOSES




• Choledocholithiasis, cholangiocarcinoma, pneumobilia, hepatocellular carcinoma


PATHOLOGY




• Possibly incited by chronic inflammation from choledocholithiasis, infection, or pancreatic juice reflux
image Chronic inflammation → proliferative changes of biliary epithelium → epithelial dysplasia

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Nov 16, 2016 | Posted by in GASTROINTESTINAL IMAGING | Comments Off on Biliary Papillomatosis

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