About Autoimmune
Hepatitis
Autoimmune
hepatitis is a disease in which the body's immune system
attacks liver cells. This causes the liver to become inflamed
(hepatitis). Researchers think a genetic factor may predispose
some people to autoimmune diseases.
The
disease is usually quite serious and, if not treated, gets
worse over time. It's usually chronic, meaning it can last for
years, and can lead to cirrhosis (scarring and
hardening) of the liver and eventually liver
failure.
Causes
One job of the
immune system is to protect the body from viruses,
bacteria, and other living organisms. Usually, the immune
system does not react against the body's own cells.
However, sometimes it mistakenly attacks the cells it is
supposed to protect.
This response is
called autoimmunity. Researchers speculate that certain
bacteria, viruses, toxins, and drugs trigger an
autoimmune response in people who are genetically
susceptible
Symptoms
Fatigue is
probably the most common symptom of autoimmune hepatitis. Other
symptoms include:
- enlarged liver
- jaundice
- itching
- skin
rashes
- joint
pain
- abdominal
discomfort
- fatigue
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- spider angiomas (abnormal
blood vessels) on the skin
- nausea
- vomiting
- loss
of appetite
- dark
urine
- pale or
gray colored
stools
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People in
advanced stages of the disease are more likely to have symptoms
such as fluid in the abdomen (ascites) or mental confusion.
Women may stop having menstrual
periods.
Diagnosis
Your doctor will
make a diagnosis based on your symptoms, blood tests, and
liver biopsy.
- Blood tests. A routine blood test for liver enzymes
can help reveal a pattern typical of hepatitis, but further
tests, especially for autoantibodies, are needed to
diagnose autoimmune hepatitis.
- Liver biopsy. A tiny sample of your liver tissue,
examined under a microscope, can help your doctor
accurately diagnose autoimmune hepatitis and tell how
serious it is.
Treatment
Treatment
works best when autoimmune hepatitis is diagnosed early. With
proper treatment, autoimmune hepatitis can usually be
controlled. In fact, recent studies show that sustained
response to treatment not only stops the disease from getting
worse, but also may actually reverse some of the
damage.
The
primary treatment is medicine to suppress (slow down) an
overactive immune system.
Both types
of autoimmune hepatitis are treated with daily doses of a
corticosteroid called prednisone. Your doctor may start you on
a high dose (20 to 60 mg per day) and lower the dose to 5 to 15
mg/day as the disease is controlled. The goal is to find the
lowest possible dose that will control your
disease.
Another
medicine, azathioprine (Imuran) is also used to treat
autoimmune hepatitis. Like prednisone, azathioprine suppresses
the immune system, but in a different way. It helps lower the
dose of prednisone needed, thereby reducing its side effects.
Your doctor may prescribe azathioprine, in addition to
prednisone, once your disease is under
control.
Summary
- Autoimmune hepatitis is a long-term
disease in which your body's immune system attacks liver
cells.
- The
disease is diagnosed using various blood tests and a liver
biopsy.
- With
proper treatment, autoimmune hepatitis can usually be
controlled. The main treatment is medicine that suppresses
the body's overactive immune system.
Reference for
Autoimmune Hepatitis Article
- National Institutes of
Health
Health
Related Websites
The National Cancer
Institute
The National Eye
Institute
The National Heart, Lung,
and Blood Institute
National Institute on
Aging
National Institute of
Allergy and Infectious Diseases
National Institute of
Arthritis and Musculoskeletal and Skin Diseases
National Institute of
Diabetes and Digestive and Kidney Diseases
National Institute on Drug
Abuse
National Institute of Mental
Health
National Institute of
Neurological Disorders and Stroke
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