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medRxiv PreprintsInternational1 October 2026

Early imaging signs associated withsubsequent diagnosis of primary sclerosingcholangitis

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BACKGROUND Primary sclerosing cholangitis (PSC) is characterized by multifocal biliary strictures on MRI/MRCP. However,we have observed that young PSC patients often displayed a marked intrahepatic bile duct visibility,sometimes with gallbladder enlargement, before developing biliary strictures. This study aimed to evaluatewhether this imaging pattern was associated with subsequent diagnosis of PSC. PATIENTS AND METHODS This retrospective two-center study included patients younger than 21 years who had a baseline liverMRI/MRCP, without biliary strictures. The endpoint was a definite diagnosis
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