Anti-neutrophil Cytoplasmic Antibody (ANCA)-associated Vasculitis Associated with Primary Biliary Cirrhosis: A Case Report and Literature Review

We herein report a rare case of microscopic polyangiitis with primary biliary cirrhosis (PBC) and a literature review of six previously reported cases of PBC complicated by anti-neutrophil cytoplasmic antibody-associated vasculitis. Due to the scarcity of similar reports, it was not possible to establish a true overlap syndrome or casual association. When the biliary enzyme levels are elevated in patients with vasculitis, physicians should thus be mindful of the possible coexistence of these diseases.