No body organ performs a wider variety of essential jobs than the liver. It:
Cirrhosis is a disease in which normal liver cells are replaced by scar tissue, which interferes with all of these important functions. In extreme cases, the damage is so severe that the only solution is a liver transplant. Cirrhosis is the twelfth leading cause of death by disease in the United States, killing as many as 25,000 people each year. It impairs thousands of other people as the liver gradually loses its ability to function.
Cirrhosis has many causes. In the United States and Europe, the most common causes are excessive alcohol use and chronic infection with the hepatitis C virus.
Alcohol has a toxic effect on liver cells. Alcoholic cirrhosis tends to develop after a decade or more of heavy drinking, although it is possible for "social drinkers" to have cirrhosis. It is not known why some people are more prone to adverse reactions than others, but women are at greater risk of cirrhosis, even when they drink less alcohol than men.
Chronic hepatitis C causes inflammation of the liver that eventually can lead to cirrhosis. One out of every five people with chronic hepatitis C develops cirrhosis after 20 years. Chronic hepatitis B, which causes damage in a similar way, is the leading cause of cirrhosis in the world but is less common in industrialized countries.
Rarer causes of cirrhosis include:
Another cause is a condition called nonalcoholic steatohepatitis (NASH), in which fat deposition in the liver leads to inflammation and scarring.
In its early stages, cirrhosis often has no symptoms. But as liver cells die, the organ makes less of the proteins that regulate fluid retention and blood clotting and loses its ability to metabolize the pigment bilirubin. This causes symptoms and complications that include:
As damage increases, the liver fails to detoxify the blood and becomes less able to metabolize many medications, which magnifies their effects. Eventually, toxins build up in the brain. These changes can produce:
Scarring also impedes blood flow and increases pressure in the portal vein, which moves blood from the stomach to the liver. This condition is called portal hypertension. Blood vessels in the stomach and esophagus swell, and the body creates new ones in an attempt to bypass the liver. These vessels, called varices, have thin walls. If one bursts, the resulting hemorrhage (major bleeding) can cause death within hours if not treated.
Your doctor will ask about your medical history, family history of liver disease, diet, alcohol consumption, medications you are taking, and risk factors for hepatitis B and C, such as intravenous drug use. During a physical examination, the doctor determines whether the liver feels harder or larger than normal, looks for skin changes such as bruising and jaundice, and looks for evidence of fluid swelling in the legs or abdomen.
Blood tests may be ordered to look for evidence of liver inflammation, bilirubin retention, a buildup of toxins or reduced levels of essential substances made by the liver. The liver may be viewed using a computerized tomography (CT) scan, or other imaging technique. Cirrhosis may be confirmed by a biopsy, in which a tiny sample of liver tissue is removed through a needle and then examined for scarring and damage to cells.
Cirrhosis is usually a progressive disease. Although it usually cannot be reversed, the liver damage can be halted or slowed down with treatment or changes in behavior in many cases.
The most important step you can take to prevent cirrhosis is to avoid excessive drinking. It is best to consume an average of no more than two alcoholic drinks a day for men or one drink a day for women. If you have chronic hepatitis or other liver problems, avoid alcohol completely.
Some other causes of cirrhosis can be prevented. To avoid infection with hepatitis B and C, do not inject illegal drugs, snort cocaine, or have unprotected sex, especially with multiple partners. If you are considering body piercing or tattooing, make sure that the equipment is cleaned properly. Health care and emergency workers should follow infection control precautions carefully whenever they are exposed to blood. Hepatitis B also can be prevented with a vaccine, a series of three shots that is 90% effective.
Treatment for cirrhosis varies depending on the cause and stage of the disease. Because liver damage usually cannot be reversed, the aim of all treatment is to keep the disease from getting worse and to reduce complications.
Regardless of the cause, anyone with cirrhosis should abstain from alcohol and use caution in taking medications that can make liver disease worse, including over-the-counter acetaminophen (Tylenol and generic types). You also will be treated for underlying diseases -- for example, interferon and other medications for viral hepatitis, corticosteroids or other immunosuppressant medications for autoimmune hepatitis, and phlebotomy, which is the periodic removal of a pint of blood -- to reduce iron levels in hemochromatosis.
Much of the treatment is directed at complications. Your doctor may recommend a low-sodium diet or diuretics if you are retaining excess fluid in your body. Laxatives may help clear your body of toxins if you suffer from confusion due to inability to rid certain protein wastes. In this situation, your diet may be restricted in protein as well. Medications can be prescribed for itching and infections. Blood pressure medicines may help to control portal hypertension.
Bleeding varices pose an immediate, life threatening hazard that can often be successfully treated. Gastroenterologists using endoscopes are able to apply rubber bands to seal off the bleeding on the ruptured varix, as well as to deflate the distention of these veins. A procedure called transjugular intrahepatic portosystemic shunt (TIPS) involves creating a new passageway for blood by inserting a tube, or shunt, through the scarred liver to take pressure off the varices. Drugs also may be prescribed to reduce distention of varices.
If the liver is too scarred to function, a transplant is the only treatment. Approximately 80% to 90% of patients survive liver transplantation, and long-term survival rates have improved because of drugs such as cyclosporine (Neoral, Sandimmune) that suppress the immune system to keep it from attacking the new liver.
If you are vomiting blood, go to the emergency room immediately. Otherwise, visit your doctor if you have any of the symptoms of cirrhosis, particularly if you are a heavy drinker or have chronic hepatitis. Patients who already have been diagnosed with cirrhosis should see a doctor promptly if symptoms get worse or if they become disoriented or develop a fever or abdominal pain.
Treatment leads to improvement in most cases when the disease is discovered in its earlier stages. Most patients are able to live a normal life for many years. The outlook is less favorable if liver damage is extensive or if someone with cirrhosis does not stop drinking. People with cirrhosis usually die of either bleeding, serious infections or kidney failure. They often enter irreversible coma in their last days.
National Institute of Diabetes & Digestive & Kidney Disorders
Office of Communications and Public Liaison
Building 31, Room 9A06
31 Center Drive, MSC 2560
Bethesda, MD 20892-2560
Phone: 301-496-3583
http://www.niddk.nih.gov/
American Liver Foundation
75 Maiden Lane
Suite 603
New York, NY 10038
Phone: 212-668-1000
Fax: 212-483-8179
http://www.liverfoundation.org/
Send this page to a friend