Basic facts about the liver

    Your liver, the largest organ in your body, weighs about three pounds and is roughly the size of a football. It lies in the upper right side of your abdomen situated mostly under the lower ribs. The normal liver is soft and smooth and is connected to the small intestine by the bile duct which carries bile formed in the liver to the intestines.
 

    Nearly all of the blood that leaves the stomach and intestines must pass through the liver. Acting as the body's largest chemical factory, it has thousands of functions including:
 

the production of clotting factors, blood proteins, bile and more than a thousand different enzymes

the metabolism of cholesterol

the storage of energy (glycogen) to fuel muscles

maintenance of normal blood sugar concentration

the regulation of several hormones

and the detoxification of drugs and poisons including alcohol. It is no wonder that liver disease can cause widespread disruption of body function. While many liver diseases can occur, one of the most important is cirrhosis.

  Cirrhosis is a term that refers to a group of chronic liver diseases in which normal liver cells are damaged and replaced by scar tissue, decreasing the amount of normal liver tissue. The distortion of the normal liver structure by the scar tissue interferes with the flow of blood through the liver. It also handicaps the function of the liver which, with the loss of normal liver tissue, leads to failure of the liver to perform some of its critically important functions. Cirrhosis and other liver diseases take the lives of over 25,000 Americans each year and rank eighth as a cause of death.

There are a number of conditions that can lead to cirrhosis:

• excessive intake of alcohol (most common)
• types B, C and D of chronic viral hepatitis,
• inherited or congenital diseases --

 Hemochromatosis  -- abnormal accumulation of iron in the liver and other organs because of the increased absorption of iron from the intestine.
Wilson's Disease--abnormal accumulation of copper in the liver and other organs due to the decreased excretion of copper from the liver.
alpha-1 antitrypsin deficiency--inherited absence of a specific enzyme in the liver.
glycogen storage diseases --inability to properly utilize sugars.
• Autoimmune Hepatitis
• prolonged obstruction or other diseases of the bile ducts (biliary cirrhosis, sclerosing cholangitis)
• prolonged exposure to environmental toxins
• some forms of heart disease (cardiac cirrhosis)
• severe reaction to drugs
• schistosomiasis (parasitic infection)

Causes of the cirrhosis can be identified by certain factors:

In alcoholic cirrhosis

• history of regular and excessive alcoholic intake
• physical and behavioral changes
• examination of liver tissue obtained by needle biopsy under local anesthesia
In active viral hepatitis infection
• blood tests
• liver biopsy

    While almost everyone who drinks excessive amounts of alcohol sustains some liver damage, it does not necessarily develop into cirrhosis. In those individuals who drink one-half to one pint (8 to 16 ounces) of hard liquor per day (or the equivalent in other alcoholic drinks), for 15 years or more, about one-third develop cirrhosis. Another third develop fatty livers, while the remainder have only minor liver problems. In general, the more you drink, the greater the frequency and regularity of excessive intake, the more likely that cirrhosis is to result. A poor diet, long considered to be the main factor in the development of cirrhosis in the alcoholic, is probably only a contributing factor. Alcohol by itself, in large amounts, is a poison which can cause cirrhosis.

    Some individuals who are "social drinkers," not alcoholics, can develop cirrhosis. Factors affecting the development of cirrhosis include:

• the amount of alcohol consumed
• the regularity of intake
• natural tendency
• perhaps the state of nutrition
    It is not known why some individuals are more prone to adverse reactions to alcohol than others. Women are less tolerant of alcohol than men. Researchers believe that this is because men have a greater ability than women to break down the alcohol for elimination. Studies show that a much higher percentage of women, consuming less alcohol than men, go on to cirrhosis.

    Some patients with chronic viral hepatitis develop cirrhosis. There are five known types of viral hepatitis, each caused by a different virus.

• Acute Hepatitis A and acute hepatitis E do not lead to chronic hepatitis.
• Acute Hepatitis B  leads to chronic infection in approximately 5% of adult patients. In a few of these patients, the chronic hepatitis B progresses to cirrhosis.
• Acute hepatitis D infects individuals already infected by hepatitis B.
• Acute Hepatitis C  becomes chronic in approximately 80% of adults. A minority of these patients (20-30%) will progress to cirrhosis, typically over many years.

    The onset of cirrhosis is often "silent" with few specific symptoms to identify what is happening in the liver. As continued scarring and destruction occur, the following signs and symptoms may appear:

• Loss of appetite
• Nausea and vomiting
• Weight loss
• Enlargement of the liver
• Jaundice--yellow discoloration of the whites of the eyes and skin occurs because bile pigment can no longer be removed by the liver
• Itching--due to the retention of bile products in the skin, i.e.  Gallstones
• Ascites--abdominal swelling due to an accumulation of fluid caused by the obstruction of blood flow through the liver
• Vomiting of blood--frequently occurs from swollen, ruptured varices (veins that burst) in the lower end of the esophagus due to the increased pressure in these vessels caused by scar tissue formation
• Increased sensitivity to drugs--due to inability of the liver to inactivate them
• Encephalopathy (impending coma)--subtle mental changes advancing to profound confusion and coma.
    Many patients may have no symptoms and are found to have cirrhosis by physical examin-ation and laboratory tests, which may have been performed in the course of treatment for unrelated illnesses.

    Treatment depends on the type and stage of the cirrhosis. It aims at stopping the progress of the cirrhosis, reversing (to whatever extent possible) the damage which has already occurred, and treating complications that are disabling or life-threatening. Stopping or reversing the process requires removal of the cause.

In alcoholic cirrhosis

• abstinence from alcohol
• an adequate, wholesome diet
In cirrhosis caused by viral hepatitis
• an approved approach is the use of interferon to improve immune responses to viral infection.
    Experts estimate that more than half of all liver diseases could be prevented if people acted upon the knowledge we already have.

    Each year more than 25 million Americans are afflicted with liver and gallbladder diseases and more than 25,000 die of chronic liver disease and cirrhosis. There are few effective treatments for most life-threatening liver diseases, except for liver transplants. Meanwhile, patients and their families must cope with medical, financial and emotional problems.

    Research has recently opened up exciting new paths for investigation, but much more remains to be done to find cures for more than 100 different liver diseases and help millions of Americans who are suffering. To increase the number of liver researchers, the American Liver Foundation encourages young scientific investigators to pursue careers in liver research by supporting bright, highly trained men and women in their quest for answers. Research and education have made a difference. When the Foundation first became operational in 1979, reported deaths due to chronic liver diseases and cirrhosis exceeded 50,000 each year. By 1992, that figure was reduced to 26,000.

    Concerned contributors like you have enabled us to increase Foundation-supported research tenfold since 1980.

    In the past year the Foundation has counselled, encouraged, and informed over 35,000 anxious victims of liver disease. We distributed two million brochures to patients and referred hundreds to medical specialists. We thank you for your thoughtful support and confidence in our efforts. You have enabled us to touch the lives of millions of Americans who look to the American Liver Foundation for guidance, support and encouragement.

In certain types of cirrhosis caused by autoimmune hepatitis

• corticosteroids alone or with azathioprine may be an effective treatment
In cirrhotic patients with jaundice
• supplemental fat soluble vitamins may be helpful
Wilson's disease
• removal of excessive copper by drugs that deplete the body's copper
 Hemochromatosis 
• removal of excess iron by phlebotomy (removal of one pint of blood per week)
Most types of cirrhosis
•  liver transplantation  with replacement of the diseased organ when advanced liver failure occurs

    Complications of cirrhosis include ascites, coma and hemorrhage from esophageal varices.

• Ascites is treated by reducing the intake of salt and the administration of drugs to improve excretion of salt and water (diuretics). In some instances, large amounts of fluid are removed by direct catheter drainage through the abdominal wall (large volume paracentesis).
• Treatment of coma, or impending coma (encephalopathy), includes specific medications, reducing the intake of protein foods, and control of intestinal hemorrhage.
• Treatment of hemorrhage from varices (internal varicose veins) includes sclerotherapy (injection of the enlarged vein with a chemical that causes scarring). Other treatments include: drugs to reduce the likelihood of bleeding or rebleeding, compression of the bleeding varices with a specially constructed balloon, and a new radiological procedure called transjugular intrahepatic portosystemic shunt (TIPS).
 Liver Diseases

    Do not drink to excess. Avoid the use of alcoholic beverages. Alcohol destroys liver cells. How well damaged cells regenerate varies with each individual. Prior injury to the liver by unknown and unrecognized viruses or chemicals can also affect the regeneration process.

    Take precautions when using man-made chemicals. The liver must process many chemicals which were not present in the past. More research is needed to determine the effects on the liver of many of these compounds. When using chemicals at work, in cleaning your home or working in your garden:

• be sure there is good ventilation
• follow directions for use of all products
• never mix chemical products
• avoid getting chemicals on the skin, where they can be absorbed, and wash promptly if you do
• avoid inhaling chemicals
• wear protective clothing

    Seek medical advice. Remain under supervision of a physician if you develop viral hepatitis until your recovery is assured.

    The responsibility of the liver for the proper functioning of the whole body is so great that the chronic disease of the liver may modify the body's responses to a variety of illnesses. Abnormal function of the liver in cirrhosis may:

• affect the dose of medicine required in the treatment of other conditions
• affect the treatment of diabetes
• alter response of the body to infection
• alter tolerance for surgical procedures
    Patients with cirrhosis are particularly prone to develop fatal bacterial infections, kidney malfunctions, stomach ulcers, gallstones, a type of diabetes and cancer of the liver.

    Treatment at this stage, with proper adherence to the physician's recommendations, leads to improvement in the majority of cases and the patient is able to pursue a normal life and activities.

    When cirrhosis is not discovered until extensive damage has resulted, the outlook may be less favorable for improvement, and complications such as ascites and hemorrhage are more likely to be encountered.

    The liver is a large organ and is able to perform its vital functions despite some damage. It also has the ability to repair itself to a limited degree. Cells that die are replaced by new cells. If the cause of cirrhosis can be removed, these factors provide hope for both improvement and carrying on a normal life.

    An increasing number of scientific investigators conducting liver research give hope for new breakthroughs in treatment, management and cures for liver diseases in the foreseeable future.

 

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The American Liver Foundation is the only national voluntary health organization dedicated to preventing, treating, and curing hepatitis and all other liver and gallbladder diseases through research and education.

American Liver Foundation 1425 Pompton Avenue, Cedar Grove, NJ 07009 1-800-223-0179 Copyright  1995