Peribiliary Cysts

 “String of pearls” or “grapes on a stem” are common appearances



• Usually multiple
image Discrete, linear, or confluent configuration

• Size is variable, up to 2.5 cm

• Smooth and thin walls; no internal structures

• No enhancement of contents on CECT or MR

• Do not communicate with biliary tree (e.g., on ERCP)




TOP DIFFERENTIAL DIAGNOSES




• Dilated, obstructed bile ducts
image Intrahepatic bile ducts rarely dilate much in cirrhosis

• Periportal edema/inflammation

• Caroli disease

• Hepatic autosomal dominant (AD) polycystic disease

• Intrahepatic bile ducts rarely dilate much in cirrhotic liver


PATHOLOGY




• Disturbed portal circulation &/or inflammation → occlusion of neck of peribiliary glands → cyst formation

• Associated with
image Cirrhosis, portal hypertension, portal vein thrombosis

image Hepatic AD polycystic disease

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Nov 16, 2016 | Posted by in GASTROINTESTINAL IMAGING | Comments Off on Peribiliary Cysts

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