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Autoimmune hepatitis overlapping with primary sclerosing cholangitis in five cases
A N McNair1, M Moloney, B C Portmann
1Institute of Liver Studies, King's College Hospital, London, United Kingdom.
The American Journal of Gastroenterology
|June 13, 1998
Summary
Autoimmune hepatitis/primary sclerosing cholangitis overlap syndrome can present with jaundice and elevated liver enzymes. This condition often responds well to immunosuppressive therapy, including prednisolone and azathioprine.
Area of Science:
- Hepatology
- Immunology
- Gastroenterology
Background:
- Autoimmune hepatitis (AIH) and primary sclerosing cholangitis (PSC) are distinct liver diseases.
- Overlap syndrome between AIH and PSC is rare but presents unique diagnostic and therapeutic challenges.
Observation:
- Five cases of AIH/PSC overlap syndrome were identified, predominantly in young males.
- Patients exhibited jaundice, elevated aminotransferases and alkaline phosphatase, hyperglobulinemia with high IgG, and autoantibodies (ANA/SMA).
- Liver biopsies showed moderate to severe interface hepatitis with biliary features in most cases.
Findings:
- All patients met criteria for definite AIH and responded well to immunosuppressive therapy (prednisolone, azathioprine).
- Relapses occurred upon treatment reduction or withdrawal.
- Cholangiographic PSC features were present in three patients initially and developed in two others over time.
- Only two patients had inflammatory bowel disease, contrasting with literature suggesting a strong association with ulcerative colitis.
Implications:
- Consider AIH/PSC overlap syndrome in patients with unexplained hepatitis, autoantibodies, and biliary changes.
- Immunosuppressive therapy may be beneficial for this specific overlap syndrome.
- Cholangiography is recommended for diagnosis in suspected cases.