We describe a hepatitis B virus carrier who satisfied the criteria of
autoimmune hepatitis proposed by the International Autoimmune Hepatiti
s Group. A 43-year-old Japanese female showed human leukocyte antigen
typing including DR4 in addition to hypergammaglobulinemia, presence o
f autoantibodies, and liver histology suggestive of autoimmune hepatit
is, Moreover, the predominant presence of hepatitis B core antigen in
nuclei rather than in cytoplasm of hepatocytes suggested less of a pos
sibility of liver cell damage related to hepatitis B virus infection,
She completely responded to immunosuppressive therapy and no clinical
or biochemical relapse has been recognized to date.