Comparing UDCA and Corticosteroids in Immunotherapy Induced Cholestatic Hepatitis

Inclusion Criteria: * Adults ≥18 years old * Any type of cancer except hepatocellular or cholangiocarcinoma * At least one ICI injection * Cholestatic hepatitis Grade CTC-AE 3 or 4 Exclusion Criteria: * Ongoing corticosteroids treatment * Other causes of hepatitis * Cirrhosis * ICI for hepatocellular carcinoma or cholangiocarcinoma * Biliary obstruction * Medical contraindication to corticosteroids or UDCA * Mixed or hepatocellular hepatitis * Total bilirubin \> 1,5 ULN, Prothrombin rate \< 70% * Medical contraindication to MRI or liver biopsy * Oher serious side effects requiring corticosteroids * Pregnant and breast-feeding patients * Patients under articles L1121-5 to 8 of the public health code * Lack of informed consent * Patients not affiliated with French social security system * Patients uncapable of understanding french