Persistent Liver Injury Following Avacopan Discontinuation in Antineutrophil Cytoplasmic Antibody-Associated Vasculitis: A Rare Case of Liver Biopsy in the Chronic Phase of Liver Injury.

Drug-induced liver injury (DILI) is a major concern associated with the use of avacopan, a new therapeutic agent for antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). Here, we report a rare instance of liver biopsy performed for persistent liver injury following discontinuation of avacopan in an elderly woman with microscopic polyangiitis (MPA). The patient developed cholestatic liver injury after 2 months of avacopan therapy, which led to drug cessation.