Unusual Cancers of Childhood Treatment (PDQ®)
General Information About Unusual Cancers of Childhood
Key Points for This Section
Unusual cancers of childhood are cancers rarely seen in children.
Cancer in children and adolescents is rare. Since 1975, the number of new cases of childhood cancer has slowly increased. Since 1975, the number of deaths from childhood cancer has decreased by more than half.
Unusual cancers are so rare that most children's hospitals are likely to see less than a handful of some types in several years. Because the unusual cancers are so rare, there is not a lot of information about what treatment works best. A child's treatment is often based on what has been learned from treating other children. Sometimes, information is available only from reports of the diagnosis, treatment, and follow-up of one child or a small group of children who were given the same type of treatment.
Many different cancers are covered in this summary. They are grouped by where they are found in the body.
Tests are used to detect (find), diagnose, and stage unusual cancers of childhood.
Tests are done to detect, diagnose, and stage cancer. The tests used depend on the type of cancer. After cancer is diagnosed, tests are done to find out if cancer cells have spread from where the cancer began to other parts of the body. The process used to find out if cancer cells have spread 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 the best treatment.
The following tests and procedures may be used to detect, diagnose, and stage cancer:
- 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.
- X-ray: An x-ray is a type of energy beam that can go through the body and onto film.
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. This procedure is also called computed tomography, computerized tomography, or computerized axial tomography.
PET scan (positron emission tomography scan): A procedure to find malignant tumor cells in the body. A small amount of radioactive glucose (sugar) is injected into a vein. The PET scanner rotates around the body and makes a picture of where glucose is being used in the body. Malignant tumor cells show up brighter in the picture because they are more active and take up more glucose than normal cells do.
MRI (magnetic resonance imaging): A procedure that uses a magnet and radio waves to make a series of detailed pictures of areas inside the body. The pictures are made by a computer. 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.
Endoscopy: A procedure to look at organs and tissues inside the body to check for abnormal areas. An endoscope is inserted through an incision (cut) in the skin or opening in the body, such as the mouth or rectum. An endoscope is a thin, tube-like instrument with a light and a lens for viewing. It may also have a tool to remove tissue or lymph node samples, which are checked under a microscope for signs of disease.
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 with cancer and is detected by a scanner.
- Biopsy: The removal of cells or tissues so they can be viewed under a microscope by a pathologist to check for signs of cancer. There are many different types of biopsy procedures. The most common types include the following:
- Fine-needle aspiration (FNA) biopsy: The removal of tissue or fluid using a thin needle.
- Core biopsy: The removal of tissue using a wide needle.
- Incisional biopsy: The removal of part of a lump or a sample of tissue that doesn’t look normal.
- Excisional biopsy: The removal of an entire lump or area of tissue that doesn’t look normal.
There are three ways that cancer spreads in the body.
- Tissue. The cancer spreads from where it began by growing into nearby areas.
- Lymph system. The cancer spreads from where it began by getting into the lymph system. The cancer travels through the lymph vessels to other parts of the body.
- Blood. The cancer spreads from where it began by getting into the blood. The cancer travels through the blood vessels to other parts of the body.
Cancer may spread from where it began to other parts of the body.
- Lymph system. The cancer gets into the lymph system, travels through the lymph vessels, and forms a tumor (metastatic tumor) in another part of the body.
- Blood. The cancer gets into the blood, travels through the blood vessels, and forms a tumor (metastatic tumor) in another part of the body.
The metastatic tumor is the same type of cancer as the primary tumor. For example, if thyroid cancer spreads to the lung, the cancer cells in the lung are actually thyroid cancer cells. The disease is metastatic thyroid cancer, not lung cancer.
Date last modified: 2016-12-01
Date last modified: 2016-12-01
Treatment Option Overview
Key Points for This Section
- There are different types of treatment for children with unusual cancers.
- Children with unusual cancers should have their treatment planned by a team of health care providers who are experts in treating cancer in children.
- Seven types of standard treatment are used:
- New types of treatment are being tested in clinical trials.
- Patients may want to think about taking part in a clinical trial.
- Patients can enter clinical trials before, during, or after starting their cancer treatment.
- Follow-up tests may be needed.
- Some cancers and cancer treatments cause side effects months or years after treatment has ended.
There are different types of treatment for children with unusual cancers.
Different types of treatments are available for children with 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 unusual cancers should have their treatment planned by a team of health care providers who are experts in treating cancer in children.
Treatment will be overseen by a pediatric oncologist, a doctor who specializes in treating children with cancer. The pediatric oncologist works with other pediatric health care providers who are experts in treating children with cancer and who specialize in certain areas of medicine. These may include the following specialists:
- Pediatric surgeon.
- Pediatric hematologist.
- Radiation oncologist.
- Pediatric nurse specialist.
- Rehabilitation specialist.
- Social worker.
Seven types of standard treatment are used:
Surgery is a procedure used to find out whether cancer is present, to remove cancer from the body, or to repair a body part. Palliative surgery is done to relieve symptoms caused by cancer. Surgery is also called an operation.
Even if the doctor removes all the cancer that can be seen at the time of the surgery, some patients may be given chemotherapy or radiation therapy after surgery to kill any cancer cells that are left. Treatment given after the surgery, to lower the risk that the cancer will come back, is called adjuvant therapy.
External radiation therapy uses a machine outside the body to send radiation toward the cancer.
Proton beam radiation therapy is a type of high-energy, external radiation therapy. A radiation therapy machine aims streams of protons (tiny, invisible, positively-charged particles) at the cancer cells to kill them. This type of treatment causes less damage to nearby healthy tissue.
- Internal radiation therapy uses a radioactive substance that is injected into the body or sealed in needles, seeds, wires, or catheters that are placed directly into or near the cancer.
- I131-MIBG (radioactive iodine) therapy is a type of internal radiation therapy used to treat pheochromocytoma and paraganglioma. Radioactive iodine is given by infusion. It enters the bloodstream and collects in certain kinds of tumor cells, killing them with the radiation that is given off.
The way the radiation therapy is given depends on the type of cancer being treated.
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 affect cancer cells throughout the body (systemic chemotherapy). When chemotherapy is placed directly into the cerebrospinal fluid, a body cavity such as the abdomen, or an organ, the drugs mainly affect cancer cells in those areas. Combination chemotherapy is treatment using more than one anticancer drug. The way the chemotherapy is given depends on the type and stage of the cancer being treated.
Hormone therapy is a cancer treatment that removes hormones or blocks their action and stops cancer cells from growing. Hormones are substances that are made by glands in the body and flow through the bloodstream. Some hormones can cause certain cancers to grow. If tests show that the cancer cells have places where hormones can attach (receptors), drugs, surgery, or radiation therapy is used to reduce the production of hormones or block them from working. Hormone therapy with drugs called corticosteroids may be used to treat thymoma or thymic carcinoma.
Immunotherapy is a 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 defenses against cancer. This type of cancer treatment is also called biotherapy or biologic therapy.
- Interferon: Interferon affects the division of cancer cells and can slow tumor growth. It is used to treat nasopharyngeal cancer and papillomatosis.
- Epstein-Barr virus (EBV)-specific cytotoxic T-lymphocytes: White blood cells (T-lymphocytes) are treated in the laboratory with Epstein-Barr virus and then given to the patient to stimulate the immune system and fight cancer. EBV-specific cytotoxic T-lymphocytes are being studied for the treatment of nasopharyngeal cancer.
- Vaccine therapy: Vaccine therapy uses a substance to stimulate the immune system to destroy a tumor. Vaccine therapy is used to treat papillomatosis.
Watchful waiting is closely monitoring a patient’s condition without giving any treatment until signs or symptoms appear or change. Watchful waiting may be used when the tumor is slow-growing or when it is possible the tumor may disappear without treatment.
Targeted therapy is a treatment that uses drugs or other substances to identify and attack specific cancer cells without harming normal cells. Types of targeted therapies used to treat unusual childhood cancers include the following:
- Kinase inhibitors: These targeted therapy drugs block signals needed for tumors to grow. Vandetanib and cabozantinib are used to treat medullary thyroid cancer. Sunitinib is used to treat gastrointestinal stromal tumors, pheochromocytoma, and paraganglioma. Everolimus is used to treat cardiac and islet cell tumors.
- Monoclonal antibodies: This targeted therapy uses antibodies made in the laboratory, from a single type of immune system cell. These antibodies can identify substances on cancer cells or normal substances that may help cancer cells grow. The antibodies attach to the substances and kill the cancer cells, block their growth, or keep them from spreading. Monoclonal antibodies are given by infusion. They may be used alone or to carry drugs, toxins, or radioactive material directly to cancer cells. Bevacizumab is a monoclonal antibody used to treat papillomatosis.
Targeted therapies are being studied in the treatment of other unusual cancers of childhood.
New types of treatment are being tested in clinical trials.
This summary section describes treatments that are being studied in clinical trials. It may not mention every new treatment being studied. Information about clinical trials is available from the NCI website.
Gene therapy is a treatment in which foreign genetic material (DNA or RNA) is inserted into a person's cells to prevent or fight disease. Gene therapy is being studied in the treatment of papillomatosis.
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. Information about clinical trials is available from the NCI website.
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.
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 child's condition has changed or if the cancer has recurred (come back). These tests are sometimes called follow-up tests or check-ups.
Some cancers and cancer treatments cause side effects months or years after treatment has ended.
Some cancers and cancer treatments cause side effects that continue or appear months or years after cancer treatment has ended. These are called late effects. Late effects may include the following:
- 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 cancers and cancer treatments. (See the PDQ summary on Late Effects of Treatment for Childhood Cancer for more information).
Date last modified: 2016-12-01
To Learn More About Childhood Cancer
For more information from the National Cancer Institute about unusual cancers of childhood, see the following:
For more childhood cancer information and other general cancer resources, see the following:
- Childhood Cancers
- CureSearch for Children's Cancer
- Late Effects of Treatment for Childhood Cancer
- Adolescents and Young Adults with Cancer
- Children with Cancer: A Guide for Parents
- Cancer in Children and Adolescents
- Coping with Cancer
- Questions to Ask Your Doctor about Cancer
- For Survivors and Caregivers
Date last modified: 2016-12-01
Last updated: 2017-01-04
Source: The National Cancer Institute's Physician Data Query (PDQ®) Cancer Information Summaries (http://www.cancer.gov/cancertopics/pdq)