Specific Biomarkers of Immune-mediated Hepatitis Secondary to Immune Checkpoint Inhibitors

6 collections of 5mL blood samples as part of usual care (pre-inclusion visit at Day-7, inclusion visit at Day 0, visit1 at Day 14, visit2 at Day 28, visit3 at Day 90, visit4 at 6 months) and 5 blood sample collections of 5 mL for proteomic analysis in the context of research (inclusion visit at Day 0, visit1 at Day 14, visit2 at Day 28, visit3 at Day 90, visit4 at 6 months)

1 liver biopsy performed as part of routine care and 1 additional sample for research: transparietal needle biopsy under ultrasound identification under local anesthesia by a radiologist, 1 to 2 cm per core taken, 2 cores are taken.