Far From the Biliary Tree: A Case of Overlapping Autoimmune Liver Disease in a Patient Presenting With Sicca Symptoms

Primary biliary cholangitis (PBC) is a chronic autoimmune condition with many extrahepatic manifestations that are commonly encountered as a patient's primary presenting complaints. Rarely, PBC co-exists as an "overlapping syndrome" with other liver-related autoimmune conditions such as autoimmune hepatitis (AIH). Presented is a rare case of PBC with features of AIH diagnosed in a patient who initially presented with hemoptysis and worsened sicca symptoms due to advanced Sjögren's syndrome. The patient had a three-year evolution of abnormal liver biochemistry and was found to be a heterozygous carrier for hereditary hemochromatosis (H63D mutation). Given that patients with PBC-AIH are at an increased risk of complications compared to isolated disease from either disorder, early diagnosis and prompt management can help spare patients from cirrhosis, liver failure and transplantation, or even death.