A misshapen lesion resulting from an impaired transformation of the bile duct plate to the bile duct during embryonic development and inadequate absorption. The disease, also known as von Meyenburg syndrome, is characterized by multiple, uniformly sized cystic lesions surrounded by a more or less variable fibrous stroma. The incidence of biliary malformations is approximately 1% to 3%, and they are usually asymptomatic, incidentally detected, and do not require special management. Successful liver transplantation using a donor liver with biliary malformation has been reported. It has been reported in the literature that the disease can lead to poorly localized abdominal pain and malignancy. MRI manifestations] The lesions are small (usually less than 1 cm), multiple, and well-defined, with low signal in T1WI and high signal in T2WI. Different from liver cysts. A. SSTSE: cyst-like high signal; B: T1 isophase: very low signal relative to the liver; C. T1 enhancement imaging: there is slight enhancement of thin wall; D. Delayed phase: there is slight continuous enhancement of the cyst wall. Pathological manifestations] Bile duct plate malformation, hyperplasia, and distortion [Differential diagnosis] Because ring enhancement is very easy to misdiagnose metastatic tumor (signal reduction in the delayed phase).