General Information About Childhood Liver Cancer

Childhood liver cancer is a disease in which malignant (cancer) cells form in the tissues of the liver.

The liver is one of the largest organs in the body. It has four lobes and fills the upper right side of the abdomen inside the rib cage. The liver has many important functions, including:

• Filtering harmful substances from the blood so they can be passed from the body in stools and urine.

• Making bile to help digest fats from food.

• Storing glycogen (sugar), which the body uses for energy.

There are two main types of childhood liver cancer:

• Hepatoblastoma: A type of liver cancer that usually does not spread outside the liver. This type usually affects children younger than 3 years old.

• Hepatocellular carcinoma: A type of liver cancer that often spreads to other places in the body. This type can affect children of any age.

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. (Refer to the PDQ summary on Adult Primary Liver Cancer Treatment for more information.)

Certain diseases and disorders can increase the risk of developing childhood liver cancer.

Anything that increases your chance of getting a disease is called a risk factor. Having a risk factor does not mean that you will get cancer; not having risk factors doesn’t mean that you will not get cancer. People who think they may be at risk should discuss this with their doctor. Risk factors for hepatoblastoma include the following:

• Being male.

• Having familial adenomatous polyposis (FAP).

• Having Beckwith-Wiedemann syndrome.

• Having had a very low weight at birth.

Risk factors for hepatocellular carcinoma include the following:

• Being male.

• Having hepatitis B or hepatitis C. The risk is greatest when the virus is passed from mother to child at birth.

• Having liver damage caused by certain diseases, such as biliary cirrhosis or tyrosinemia.

Possible signs of childhood liver cancer include a lump or pain in the abdomen.

Symptoms are more common after the tumor becomes large. Other conditions can cause the same symptoms. A doctor should be consulted if any of the following problems occur:

• A painless lump in the abdomen.

• Swelling or pain in the abdomen.

• Weight loss for no known reason.

• Loss of appetite.

• Early puberty in boys.

• Nausea and vomiting.

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

• Serum tumor marker test: A procedure in which a blood sample is checked to measure the amounts of certain substances released into the blood by organs, tissues, or tumor cells in the body. Certain substances are linked to specific types of cancer when found in increased levels in the blood. These are called tumor markers. The blood of children who have liver cancer may have increased amounts of a protein called alpha-fetoprotein (AFP) or a hormone called beta-human chorionic gonadotropin (β-hCG). Other cancers and certain noncancerous conditions, including cirrhosis and hepatitis, may also increase AFP levels.

• Complete blood count (CBC): 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 hemoglobin (the protein that carries oxygen) in the red blood cells.
  • The portion of the blood sample made up of red blood cells.

• Liver function tests: A procedure in which a blood sample is checked to measure the amounts of certain substances released into the blood by the liver. A higher than normal amount of a substance can be a sign of liver cancer.

• Abdominal x-ray: An x-ray of the organs in the abdomen. An x-ray is a type of energy beam that can go through the body onto film, making a picture of areas inside the body.

• Ultrasound exam: 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. The picture can be printed to be looked at later.

• 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. In childhood liver cancer, a CT scan of the chest and abdomen is usually done.

• 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).

• 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 during surgery to remove or view the tumor. A pathologist views the sample under a microscope to determine the type of liver cancer.

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 tumor, whether it affects part or all of the liver, and whether it has spread to other places in the body, such as the lungs).

• Whether the cancer can be removed completely by surgery.

• The type of liver cancer (hepatoblastoma or hepatocellular).

• Whether the cancer has just been diagnosed or has recurred.

Prognosis may also depend on:

• Certain features of the cancer cell (how it looks under a microscope).

• Whether the AFP blood levels go down after chemotherapy begins.

Childhood liver cancer may be cured if the tumor is small and can be completely removed by surgery. Complete removal is possible more often for hepatoblastoma than for hepatocellular carcinoma.

Stages of Childhood Liver Cancer

After childhood 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.

There are 2 staging systems for childhood liver cancer:

• Postsurgical (after surgery) staging: The stage is based on the amount of tumor that remains after the patient has had surgery to look at or remove the tumor. Postsurgical staging is used for most childhood liver cancer.

• Presurgical (before surgery) staging: The stage is based on where the tumor has spread within the four parts (quadrants) of the liver, as shown by imaging procedures such as MRI or CT. This staging system, called PRETEXT, may be used for childhood hepatoblastoma.

The following tests and procedures may be used in the staging process:

• 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 exam: 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. The picture can be printed to be looked at later.

• Surgery: An operation will be done to look at or remove the tumor. Tissues removed during surgery will be checked by a pathologist.

There are three ways that cancer spreads in the body.

The three ways that cancer spreads in the body are:

• Through tissue. Cancer invades the surrounding normal tissue.

• Through the lymph system. Cancer invades the lymph system and travels through the lymph vessels to other places in the body.

• Through the blood. Cancer invades the veins and capillaries and travels through the blood to other places in the body.

When cancer cells break away from the primary (original) tumor and travel through the lymph or blood to other places in the body, another (secondary) tumor may form. This process is called metastasis. The secondary (metastatic) tumor is the same type of cancer as the primary tumor. For example, if breast cancer spreads to the bones, the cancer cells in the bones are actually breast cancer cells. The disease is metastatic breast cancer, not bone cancer.

The following stages are used after surgery:

Stage I

In stage I, all of the cancer was removed by surgery.

Stage II

In stage II, all of the cancer that can be seen without a microscope was removed by surgery. A small amount of cancer remains in the liver, but it can be seen only with a microscope or the tumor cells may have spilled into the abdomen during surgery.

Stage III

In stage III:

• the tumor cannot be removed by surgery; or

• cancer that can be seen without a microscope remains after surgery; or

• the cancer has spread to nearby lymph nodes.

Stage IV

In stage IV, the cancer has spread to other parts of the body.

The following stages are used for childhood hepatoblastoma before surgery:

PRETEXT Stage 1

In stage 1, the cancer is found in one quadrant of the liver.

PRETEXT Stage 2

In stage 2, cancer is found in two quadrants of the liver that are next to each other.

PRETEXT Stage 3

In stage 3, cancer is found in three quadrants of the liver that are next to each other or two quadrants that are not next to each other.

PRETEXT Stage 4

In stage 4, cancer is found in all four quadrants.

Recurrent Childhood Liver Cancer

Recurrent childhood liver cancer is cancer that has recurred (come back) after it has been treated. The cancer may come back in the liver or in other parts of the body.

Treatment Option Overview

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

Different types of treatments are available for children with liver cancer. Some treatments are standard (the currently used treatment), and some are being tested in clinical trials. 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.

Because cancer in children is rare, taking part in a clinical trial should be considered. Some clinical trials are open only to patients who have not started treatment.

Children with liver cancer should have their treatment planned by a team of doctors with expertise in treating this rare childhood cancer.

Your child’s treatment will be overseen by a pediatric oncologist, a doctor who specializes in treating children with cancer. The pediatric oncologist may refer you to other pediatric doctors who specialize in certain areas of medicine and who have experience and expertise in treating children who have liver cancer. It is especially important to have a pediatric surgeon with experience in liver surgery. Other specialists may include the following:

• Radiation oncologist.

• Pediatric nurse specialist.

• Rehabilitation specialist.

• Psychologist.

• Social worker.

Some cancer treatments cause side effects months or years after treatment has ended.

Some cancer treatments cause side effects that continue or appear months or years after cancer treatment has ended. These are called late effects. Late effects of cancer treatment may include:

• Physical problems.

• Changes in mood, feelings, thinking, learning, or memory.

• Second cancers (new types of cancer).

Some late effects may be treated or controlled. It is important to talk with your child's doctors about the possible late effects caused by some treatments. (See the PDQ summary on Late Effects of Treatment for Childhood Cancer for more information).

Three types of standard treatment are used:

Surgery

When possible, the cancer is removed by surgery.

• 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 part of the liver, along with a small amount of normal tissue around it.

• Total hepatectomy and liver transplant: Removal of the entire liver and replacement with a healthy liver from a donor. A liver transplant may be possible when cancer has not spread beyond the liver and a donated liver can be found. If the patient has to wait for a donated liver, other treatment is given as needed.

• Resection of metastases: Surgery to remove cancer that has spread outside of the liver, such as to nearby tissues, the lungs, or the brain.

Chemotherapy or radiation therapy is sometimes given before surgery, to shrink the tumor and make it easier to remove. This is called neoadjuvant therapy. Even if the doctor removes all the cancer that can be seen at the time of the surgery, some patients may be given chemotherapy after surgery to kill any cancer cells that are left. Treatment given after the surgery, to increase the chances of a cure, is called adjuvant therapy.

Chemotherapy

Chemotherapy is a cancer treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them 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, an organ, or a body cavity such as the abdomen, the drugs mainly affect cancer cells in those areas (regional chemotherapy).

Chemoembolization of the hepatic artery (the main artery that supplies blood to the liver) is a type of regional chemotherapy used to treat childhood liver cancer. The anticancer drug is injected into the hepatic artery through a catheter (thin tube). The drug is mixed with a substance that blocks the artery, cutting off blood flow to the tumor. Most of the anticancer drug is trapped near the tumor and only a small amount of the drug reaches other parts of the body. The blockage may be temporary or permanent, depending on the substance used to block the artery. The tumor is prevented from getting the oxygen and nutrients it needs to grow. The liver continues to receive blood from the hepatic portal vein, which carries blood from the stomach and intestine.

Treatment using more than one anticancer drug is called combination chemotherapy. The way the chemotherapy is given depends on the type and stage of the cancer being treated.

Radiation therapy

Radiation therapy is a cancer treatment that uses high-energy x-rays or other types of radiation to kill cancer cells or keep them from growing. There are two types of radiation therapy. 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. The way the radiation therapy is given depends on the type and stage of the cancer being treated.

New types of treatment are being tested in clinical trials.

Information about clinical trials is available from the NCI Web site.

Patients may want to think about taking part in a clinical trial.

For some patients, taking part in a clinical trial may be the best treatment choice. Clinical trials are part of the cancer research process. Clinical trials are done to find out if new cancer treatments are safe and effective or better than the standard treatment.

Many of today's standard treatments for cancer are based on earlier clinical trials. Patients who take part in a clinical trial may receive the standard treatment or be among the first to receive a new treatment.

Patients who take part in clinical trials also help improve the way cancer will be treated in the future. Even when clinical trials do not lead to effective new treatments, they often answer important questions and help move research forward.

Patients can enter clinical trials before, during, or after starting their cancer treatment.

Some clinical trials only include patients who have not yet received treatment. Other trials test treatments for patients whose cancer has not gotten better. There are also clinical trials that test new ways to stop cancer from recurring (coming back) or reduce the side effects of cancer treatment.

Clinical trials are taking place in many parts of the country. See the Treatment Options section that follows for links to current treatment clinical trials. These have been retrieved from NCI's clinical trials database.

Follow-up tests may be needed.

Some of the tests that were done to diagnose the cancer or to find out the stage of the cancer may be repeated. Some tests will be repeated in order to see how well the treatment is working. Decisions about whether to continue, change, or stop treatment may be based on the results of these tests. This is sometimes called re-staging.

Some of the tests will continue to be done from time to time after treatment has ended. The results of these tests can show if your condition has changed or if the cancer has recurred (come back). These tests are sometimes called follow-up tests or check-ups.

Treatment Options by Stage

A link to a list of current clinical trials is included for each treatment section. For some types or stages of cancer, there may not be any trials listed. Check with your doctor for clinical trials that are not listed here but may be right for you.

Stage I and II Childhood Liver Cancer

Treatment for stages I and II and PRETEXT stages 1, 2, and 3 hepatoblastoma may include the following:

• Surgery to remove the tumor, followed by chemotherapy or watchful waiting (closely monitoring a patient’s condition without giving any treatment until symptoms appear or change).

• Chemotherapy to shrink the tumor, followed by surgery to remove the tumor.

Treatment for stage I and II hepatocellular carcinoma is usually surgery to remove the tumor, followed by combination chemotherapy.

Check for U.S. clinical trials from NCI's PDQ Cancer Clinical Trials Registry that are now accepting patients with stage I childhood liver cancer and stage II childhood liver cancer.

Stage III Childhood Liver Cancer

Treatment of stage III and PRETEXT stage 4 hepatoblastoma may include the following:

• Combination chemotherapy to shrink the tumor, followed by surgery to remove as much of the tumor as possible.

• If the tumor cannot be removed by surgery after chemotherapy, further treatment may include the following:
  • High-dose chemotherapy.
  • Radiation therapy.
  • Chemoembolization of the hepatic artery.
  • Liver transplant.

• A clinical trial of combination chemotherapy.

Treatment of stage III hepatocellular carcinoma is usually combination chemotherapy to shrink the tumor, followed by surgery to remove as much of the tumor as possible.

Check for U.S. clinical trials from NCI's PDQ Cancer Clinical Trials Registry that are now accepting patients with stage III childhood liver cancer.

Stage IV Childhood Liver Cancer

Treatment of stage IV hepatoblastoma may include the following:

• Combination chemotherapy to shrink the tumor, followed by surgery to remove as much of the cancer as possible, including cancer that has spread to the lungs. If the cancer is completely removed, additional chemotherapy is given to kill any cancer cells that may remain.

• If the tumor cannot be removed by surgery after chemotherapy, further treatment may include the following:
  • High-dose chemotherapy.
  • Radiation therapy followed by surgery to remove as much of the tumor as possible.
  • Chemoembolization of the hepatic artery.
  • Liver transplant.

• A clinical trial of chemotherapy.

Treatment of stage IV hepatocellular carcinoma may be combination chemotherapy to reduce the size of the tumor, followed by surgery to remove as much of the tumor as possible.

Check for U.S. clinical trials from NCI's PDQ Cancer Clinical Trials Registry that are now accepting patients with stage IV childhood liver cancer.

Treatment Options for Recurrent Childhood Liver Cancer

Treatment of recurrent hepatoblastoma is usually surgery to remove isolated (single and separate) metastatic tumors.

Treatment in a clinical trial should be considered for recurrent hepatocellular carcinoma.

Check for U.S. clinical trials from NCI's PDQ Cancer Clinical Trials Registry that are now accepting patients with recurrent childhood liver cancer.

To Learn More About Childhood Liver Cancer

For more information from the National Cancer Institute about childhood liver cancer, see What You Need to Know About™ Liver Cancer.

For more childhood cancer information and other general cancer resources from the National Cancer Institute, see the following:

• What You Need to Know About™ Cancer - An Overview

• Childhood Cancers

• CureSearch - National Childhood Cancer Foundation Children’s Oncology Group

• Late Effects of Treatment for Childhood Cancer

• Young People with Cancer: A Handbook for Parents

• Care for Children and Adolescents with Cancer: Questions and Answers

• Understanding Cancer Series: Cancer

• Staging: Questions and Answers

• Coping with Cancer

• Support and Resources

• Cancer Library

• Information for Survivors/Caregivers/Advocates

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Changes to This Summary (07/01/2008)

The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.

Several enhancements have been made to this summary to better explain certain medical concepts and to help readers find information about clinical trials. The following changes were made:

• Text describing the way cancer spreads in the body was added to the Stages section.

• Information about patients taking part in clinical trials and about follow-up tests was added to the Treatment Option Overview section.

• Links to ongoing clinical trials listed in NCI's PDQ Cancer Clinical Trials Registry were added to the Treatment Options section.

• A new section called "To Learn More" was added. It includes links to more information about this type of cancer and about cancer in general.

• The "Get More Information from NCI" section (originally called "To Learn More") was revised.

Last Modified: 2008-07-01