Liver Diseases

Definition

The liver is an organ about the size of a football that sits just under your rib cage on the right side of your abdomen. The liver is essential for digesting food and ridding your body of toxic substances.

Liver disease can be inherited (genetic) or caused by a variety of factors that damage the liver, such as viruses and alcohol use. Obesity is also associated with liver damage. Over time, damage to the liver results in scarring (cirrhosis), which can lead to liver failure, a life-threatening condition.

Symptoms

Signs and symptoms of liver disease include:

• Skin and eyes that appear yellowish (jaundice)
• Abdominal pain and swelling
• Swelling in the legs and ankles
• Itchy skin
• Dark urine color
• Pale stool color, or bloody or tar-colored stool
• Chronic fatigue
• Nausea or vomiting
• Loss of appetite
• Tendency to bruise easily

Liver disease has many causes.

Infection

Parasites and viruses can infect the liver, causing inflammation and that reduces liver function. The viruses that cause liver damage can be spread through blood or semen, contaminated food or water, or close contact with a person who is infected. The most common types of liver infection are hepatitis viruses, including:

• Hepatitis A
• Hepatitis B
• Hepatitis C

Immune system abnormality

Diseases in which your immune system attacks certain parts of your body (autoimmune) can affect your liver. Examples of autoimmune liver diseases include:

• Autoimmune hepatitis
• Primary biliary cirrhosis
• Primary sclerosing cholangitis

Genetics

An abnormal gene inherited from one or both of your parents can cause various substances to build up in your liver, resulting in liver damage. Genetic liver diseases include:

• Hemochromatosis
• Hyperoxaluria and oxalosis
• Wilson’s disease

Cancer and other growths

Examples include:

• Liver cancer
• Bile duct cancer
• Liver adenoma

Other

Additional, common causes of liver disease include:

• Chronic alcohol abuse
• Fat accumulating in the liver (nonalcoholic fatty liver disease)

Tests and diagnosis

Finding the cause and extent of liver damage is important in guiding treatment.
Your doctor is likely to start with a health history and thorough physical examination. Your doctor may then recommend:

• Blood tests. A group of blood tests called liver function tests can be used to diagnose liver disease. Other blood tests can be done to look for specific liver problems or genetic conditions.
• Imaging tests. CT scan, MRI and ultrasound can show liver damage.
• Tissue analysis. Removing a tissue sample (biopsy) from your liver may help diagnose liver disease. Liver biopsy is most often done using a long needle inserted through the skin to extract a tissue sample. It is then analyzed in a laboratory.

Treatment and drugs

Treatment for liver disease depends on your diagnosis. Some liver problems can be treated with lifestyle modifications, such as stopping alcohol use or losing weight, typically as part of a medical program that includes careful monitoring of liver function. Other liver problems may be treated with medications or may require surgery.

Treatment for liver disease that causes liver failure may ultimately require a liver transplant.