Seronegative Autoimmune Hepatitis: Case Report
DOI:
https://doi.org/10.22516/25007440.1044Keywords:
Seronegative autoimmune hepatitis, Liver biopsy, Autoantibodies, Transaminitis, Hepatocellular injuryAbstract
Autoimmune hepatitis (AIH) is an immune-mediated inflammatory disease that requires the integration of histological abnormalities, characteristic laboratory findings, autoantibody positivity, and exclusion of other liver diseases for diagnosis. The case of a 28-year-old female patient with a week-long history of generalized jaundice associated with diffuse and intermittent abdominal pain is presented. Liver tests revealed hepatocellular injury (R factor = 17.6) with severe transaminitis (aspartate aminotransferase [AST]: 1.502 IU/L, alanine aminotransferase [ALT]: 2.029 IU/L) and conjugated hyperbilirubinemia (total serum bilirubin: 10.9 mg/dL, direct bilirubin: 8.50 mg/dL). Serological tests for hepatotropic viruses were negative, as were autoantibodies for autoimmune hepatitis. Percutaneous liver biopsy revealed findings compatible with autoimmune hepatitis. The revised 1999 International Autoimmune Hepatitis Group (IAIHG) score was calculated pretreatment, resulting in a score of 16, thus diagnosing it as definitive severe AIH. The patient was treated with oral steroids, obtaining clinical and biochemical improvement, so she was discharged after seven days of hospitalization without incidents. Maintaining a high index of suspicion for AIH, despite the initial negativity of autoantibodies, and complementing the diagnostic approach with percutaneous liver biopsy allow the timely diagnosis and treatment of this group of patients, thus preventing progression to advanced cirrhosis and its complications.
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