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. 2022 May 27;14(5):923–943. doi: 10.4254/wjh.v14.i5.923

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©The Author(s) 2022. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

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A 34-year-old female patient. Liver magnetic resonance imaging demonstrated a multiloculated cystic mass in S4b, hypointense on T1 sequences with isointense septa, hyperintense on T2 sequences, slightly hyperintense on diffusion weighted images and without significant restriction on the ADC map. On dynamic study after gadoxetic acid administration, the lesion presents no enhancement even in the septal components. On the hepatobiliary excretion phase the mass is hypointense. After surgical resection, histological examination demonstrated a biliary cystadenoma. A: In-phase T1-weighted image; B: Out-of-phase T1-weighted image; C: T2-weighted image; D: T2-Spectral Attenuated Inversion Recovery; E: High b-value diffusion weighted imaging; F: ADC map; G: Arterial phase magnetic resonance imaging (MRI); H: Portal venous phase MRI; I: Delayed phase MRI; J: Hepatobiliary phase MRI.