1. Biliary hamartoma = Biliary microhamartoma = von Meyenburg complex
Congenital bile duct malformation due to the failure of embryonic involution of the bile duct
Usually incidental finding
Imaging findings
Multiple round or irregular focal lesions of nearly uniform in size (up to 15mm in diameter) scattered throughout the liver
Radiographics 2005;25: , Radiographics 2001;21:

2. Biliary hamartoma USG CT MRI DDx.
Multiple hypo- or hyper-echoic lesions w/wo comet tail echoes CT
Multiple hypoattenuating, cyst-like nodules
MRI
T1 low, T2 high
No contrast enhancement (mostly)
MRCP: No communication between the cystic lesions and normal sized intra/extrahepatic biliary system
DDx.
Metastasis
Simple hepatic cysts
Radiographics 2005;25: , Radiographics 2001;21: