Evaluate the proportion of seronegative auto-immune hepatitis and a possible relationship with the severity of the disease. Criteria of severity will be defined by corticodependance, corticoresistance and a severe form of the disease at diagnosis (cirrhosis or fulminant hepatitis). In case of predominant seronegative forms, other auto-antibodies related to this auto-immue hepatitis will be searched.
Patients from the Guadeloupean constitutive center of rare diseases (CCRD Filfoie) and from the Saint-Antoine hospital will be retrospectively analyzed, and new patients will be prospectively followed.