A 28-year-old woman presents to the clinic with complaints of fatigue, malaise, and jaundice that began 2 weeks ago. She also reports mild abdominal discomfort in the right upper quadrant and dark-colored urine. She denies alcohol use, recent medication changes, or travel history. Her past medical history is unremarkable, but her mother has rheumatoid arthritis. Physical Examination: General: Appears fatigued, with mild scleral icterus. Abdomen: Mild tenderness in the right upper quadrant without rebound or guarding. No hepatomegaly or ascites. Skin: No rashes or bruising. Investigations: 1.Laboratory Tests: Elevated ALT: 550 U/L (normal: 10–40 U/L). Elevated AST: 480 U/L (normal: 10–40 U/L). Elevated total bilirubin: 4.2 mg/dL (normal: 0.1–1.2 mg/dL). Elevated IgG: 22 g/L (normal: 7–16 g/L). Positive ANA and SMA antibodies. Negative viral serologies (hepatitis A, B, C). 2.Liver Biopsy: Shows interface hepatitis with lymphoplasmacytic infiltration and fibrosis. What is the most likely diagnosis?
