The liver is the largest of the body's organs. It lies in the upper right side of the abdomen, with most of it protected by the ribs It weighs about 3 pounds (1.5 kilogrammes), making it the largest organ in the body. It pulses continuously as 1 1/2 litres (2 1/2 pints) of blood pass through it every minute. There are reservoirs of blood in the liver called venous sinuses which can hold up to 3 1/2 litres (6 pints) for boosting blood volume in  emergencies. The liver is a 24 hour chemical plant responsible for the production, storage, metabolism and distribution of a multitude of nutrients essential to a healthy body. It takes in waste products, converts some of them into useable elements and excretes those which are harmful. At the same time the liver produces Vitamin A and stores Vitamins A, D and B12. A chemical company would require a plant covering several acres to perform its simpler tasks. The more complicated ones it could not do at all.

Adult primary liver cancer is a disease in which malignant cells form in the tissues of the liver. The liver is one of the largest organs in the body, filling the upper right side of the abdomen inside the rib cage. It has two parts, a right lobe and a smaller left lobe. The liver makes enzymes and bile that help digest food and change it into energy. The liver also filters and stores blood.

This summary refers to the treatment of primary liver cancer (cancer that begins in the liver). Treatment of metastatic liver cancer, which is cancer that begins in other parts of the body and spreads to the liver, is not discussed in this summary. Primary liver cancer can occur in both adults and children. Treatment for children, however, is different than treatment for adults.

Having hepatitis or cirrhosis can affect the risk of developing adult primary liver cancer.
The following are possible risk factors for adult primary liver cancer:

Having hepatitis B and/or hepatitis C.
Having a close relative with both hepatitis and liver cancer.
Having cirrhosis.
Eating foods tainted with aflatoxin (poison from a fungus that can grow on foods, such as grains and nuts, that have not been stored properly).
Possible signs of adult primary liver cancer include a lump or pain on the right side.
These symptoms may be caused by swelling of the liver. These and other symptoms may be caused by adult primary liver cancer or by other conditions. A doctor should be consulted if any of the following problems occur:

A hard lump on the right side just below the rib cage.
Discomfort in the upper abdomen on the right side.
Pain around the right shoulder blade.
Unexplained weight loss.
Jaundice (yellowing of the skin and whites of the eyes).
Unusual tiredness.
Nausea.
Loss of appetite.

Tests that examine the liver and the blood are used to detect (find) and diagnose adult primary liver cancer.

The following tests and procedures may be used:

Physical exam and history: An exam of the body to check general signs of health, including checking for signs of disease, such as lumps or anything else that seems unusual. A history of the patient’s health habits and past illnesses and treatments will also be taken.
Blood chemistry studies: A procedure in which a blood sample is checked to measure the amounts of certain substances released into the blood by organs and tissues in the body. An unusual (higher or lower than normal) amount of a substance can be a sign of disease in the organ or tissue that produces it. An increased level of alpha-fetoprotein (AFP) in the blood may be a sign of liver cancer. Other cancers and certain non-cancerous conditions, including cirrhosis and hepatitis, may also increase AFP levels.
Complete blood count: A procedure in which a sample of blood is drawn and checked for the following:
The number of red blood cells, white blood cells, and platelets.
The amount of haemoglobin (the protein that carries oxygen) in the red blood cells.
The portion of the sample made up of red blood cells.
Laparoscopy: A surgical procedure to look at the organs inside the abdomen to check for abnormal areas. An incision (cut) is made in the abdominal wall and a laparoscope (a thin, lighted tube) is inserted into the abdomen. Tissue samples and lymph nodes may be removed for biopsy.
Biopsy: The removal of cells or tissues so they can be viewed under a microscope to check for signs of cancer. The sample may be taken using a fine needle inserted into the liver during an x-ray or ultrasound. This is called needle biopsy or fine-needle aspiration. The biopsy may be done during a laparoscopy.
CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly. This procedure is also called computed tomography, computerized tomography, or computerized axial tomography.
MRI (magnetic resonance imaging): A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the body. This procedure is also called nuclear magnetic resonance imaging (NMRI).
Ultrasound: A procedure in which high-energy sound waves (ultrasound) are bounced off internal tissues or organs and make echoes. The echoes form a picture of body tissues called a sonogram.
Certain factors affect prognosis (chance of recovery) and treatment options.
The prognosis (chance of recovery) and treatment options depend on the following:

• The stage of the cancer (the size of the tumour, whether it affects part or all of the liver, or has spread to other places in the body).
   
• How well the liver is working.
   
• The patient’s general health, including whether there is cirrhosis of the liver.

Prognosis is also affected by alpha-fetoprotein (AFP) levels.
After adult primary liver cancer has been diagnosed, tests are done to find out if cancer cells have spread within the liver or to other parts of the body.
The process used to find out if cancer has spread within the liver or to other parts of the body is called staging. The information gathered from the staging process determines the stage of the disease. It is important to know the stage in order to plan treatment. The following tests and procedures may be used in the staging process:

Chest x-ray: An x-ray of the organs and bones inside the chest. An x-ray is a type of energy beam that can go through the body and onto film, making a picture of areas inside the body.

CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly. This procedure is also called computed tomography, computerized tomography, or computerized axial tomography.

MRI (magnetic resonance imaging): A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the body. This procedure is also called nuclear magnetic resonance imaging (NMRI).

Bone scan: A procedure to check if there are rapidly dividing cells, such as cancer cells, in the bone. A very small amount of radioactive material is injected into a vein and travels through the bloodstream. The radioactive material collects in the bones and is detected by a scanner.

Doppler ultrasound: A type of ultrasound that uses differences in the ultrasound echoes to measure the speed and direction of blood flow.

The following stages are used for adult primary liver cancer:

Stage I
In stage I, there is one tumour and it has not spread to nearby blood vessels.

Stage II
In stage II, one of the following is found: one tumour that has spread to nearby blood vessels; or more than one tumour, none of which is larger than 5 centimetres (about 2 inches).
 

Stage III
Stage III is divided into stage IIIA, IIIB, and IIIC.

Stage IIIA: In stage IIIA, one of the following is found: more than one tumour larger than 5 centimetres; or one tumour that has spread to a major branch of blood vessels near the liver.

Stage IIIB: In stage IIIB, there are one or more tumours of any size that have either: spread to nearby organs other than the gallbladder; or broken through the lining of the peritoneal cavity.

Stage IIIC: In stage IIIC, the cancer has spread to nearby lymph nodes.

Stage IV
In stage IV, cancer has spread beyond the liver to other places in the body, such as the bones or lungs. The tumours may be of any size and may also have spread to nearby blood vessels and/or lymph nodes.

For adult primary liver cancer, stages are also grouped according to how the cancer may be treated. There are 3 treatment groups:
 

Localized resectable
The cancer is found in the liver only, has not spread, and can be completely removed by surgery.

Localized and locally advanced unresectable
The cancer is found in the liver only and has not spread, but cannot be completely removed by surgery.

Advanced
Cancer has spread throughout the liver or has spread to other parts of the body, such as the lungs and bone.

There are different types of treatment for patients with adult primary liver cancer.

Different types of treatments are available for patients with adult primary liver cancer. Some treatments are standard (the currently used treatment), and some are being tested in clinical trials. Before starting treatment, patients may want to think about taking part in a clinical trial. A treatment clinical trial is a research study meant to help improve current treatments or obtain information on new treatments for patients with cancer. When clinical trials show that a new treatment is better than the “standard” treatment, the new treatment may become the standard treatment.

Four types of standard treatment are used:

Surgery

The following types of surgery may be used to treat liver cancer:

• Cryosurgery: A treatment that uses an instrument to freeze and destroy abnormal tissue, such as carcinoma in situ (cancer that involves only the cells in which it began and that has not spread to nearby tissues). This type of treatment is also called cryotherapy. The doctor may use ultrasound to guide the instrument.
• Partial hepatectomy: Removal of the part of the liver where cancer is found. The part removed may be a wedge of tissue, an entire lobe, or a larger portion of the liver, along with some of the healthy tissue around it. The remaining liver tissue takes over the functions of the liver.
• Total hepatectomy and liver transplant: Removal of the entire liver and replacement with a healthy donated liver. A liver transplant may be done when the disease is in the liver only and a donated liver can be found. If the patient has to wait for a donated liver, other treatment is given as needed.
• Radiofrequency ablation: The use of a special probe with tiny electrodes that kill cancer cells. Sometimes the probe is inserted directly through the skin and only local anaesthesia is needed. In other cases, the probe is inserted through an incision in the abdomen. This is done in the hospital with general anaesthesia.

Radiation therapy

Radiation therapy is a cancer treatment that uses high-energy x-rays or other types of radiation to kill cancer cells. Radiation therapy is given in different ways:

• External radiation therapy uses a machine outside the body to send radiation toward the cancer.
• Internal radiation therapy uses a radioactive substance sealed in needles, seeds, wires, or catheters that are placed directly into or near the cancer.
• Drugs called radio sensitizers may be given with the radiation therapy to make the cancer cells more sensitive to radiation.
• Radiation may be delivered to the tumour using radio-labelled antibodies. Radioactive substances are attached to antibodies made in the laboratory. These antibodies, which target tumour cells, are injected into the body and the tumour cells are killed by the radioactive substance.

The way the radiation therapy is given depends on the type and stage of the cancer being treated.

Chemotherapy

Chemotherapy is a cancer treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping the cells from dividing. When chemotherapy is taken by mouth or injected into a vein or muscle, the drugs enter the bloodstream and can reach cancer cells throughout the body (systemic chemotherapy). When chemotherapy is placed directly into the spinal column, a body cavity such as the abdomen, or an organ, the drugs mainly affect cancer cells in those areas. This is called regional chemotherapy.

Regional chemotherapy is usually used to treat liver cancer. A small pump containing anticancer drugs may be placed in the body. The pump puts the drugs directly into the blood vessels that go to the tumour.

Another type of regional chemotherapy is chemo-embolization of the hepatic artery. This involves blocking the hepatic artery (the main artery that supplies blood to the liver) and injecting anticancer drugs between the blockage and the liver. The liver’s arteries then deliver the drugs throughout the liver. Only a small amount of the drug reaches other parts of the body. The blockage may be temporary or permanent, depending on what is used to block the artery. The liver continues to receive some blood from the hepatic portal vein, which carries blood from the stomach and intestine.

The way the chemotherapy is given depends on the type and stage of the cancer being treated.

Percutaneous ethanol injection

Percutaneous ethanol injection is a cancer treatment in which a small needle is used to inject ethanol (alcohol) directly into a tumour to kill cancer cells. The procedure may be done once or twice a week. Usually local anaesthesia is used, but if the patient has many tumours in the liver, general anaesthesia may be needed.

Other types of treatment are being tested in clinical trials. These include the following:

Hyperthermia therapy

Hyperthermia therapy is the use of a special machine to heat the body for a period of time to kill cancer cells. Because some cancer cells are more sensitive to heat than normal cells are, the cancer cells die and the tumour shrinks.

Biologic therapy

Biologic therapy is treatment that uses the patient’s immune system to fight cancer. Substances made by the body or made in a laboratory are used to boost, direct, or restore the body’s natural defences against disease. This type of cancer treatment is also called biotherapy or immunotherapy.

Treatment Options for Adult Primary Liver Cancer
Localized Resectable Adult Primary Liver Cancer
Treatment of localized resectable adult primary liver cancer may include the following:

Surgery (partial hepatectomy).
Surgery (total hepatectomy) and liver transplant.

Localized and Locally Advanced Unresectable Adult Primary Liver Cancer
Treatment of localized and locally advanced unresectable adult primary liver cancer may include the following:

Chemotherapy (regional chemotherapy or chemo-embolization).
Surgery (cryosurgery or radiofrequency ablation).
Surgery (total hepatectomy) and liver transplant.
Percutaneous ethanol injection.
Radiation therapy with radio sensitizers.
A clinical trial of regional or systemic chemotherapy and/or radio-labelled antibodies.
A clinical trial of a combination of surgery, chemotherapy, and radiation therapy. Hyperthermia therapy may also be used. Chemotherapy and radiation therapy may be used to shrink the tumour before surgery.

Advanced Adult Primary Liver Cancer
There is no standard treatment for advanced adult primary liver cancer. Patients may consider taking part in a clinical trial. Treatment may include the following:

A clinical trial of biologic therapy, chemotherapy, and/or radiation therapy with or without radio sensitizers. These treatments may be given as palliative therapy to help relieve symptoms and improve the quality of life.

Recurrent Adult Primary Liver Cancer
Treatment of recurrent adult primary liver cancer may include the following:

Surgery (partial hepatectomy).
Surgery (total hepatectomy) and liver transplant.
Chemotherapy (chemo-embolization or systemic chemotherapy).
Percutaneous ethanol injection.
A clinical trial of a new therapy.
 

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