Childhood Thyroid Cancer Treatment (PDQ®): Treatment – Patient Information [NCI]

Thyroid cancer is a disease in which malignant (cancer) cells form in the tissues of the thyroid gland. The thyroid is a gland at the base of the throat near the trachea (windpipe). It is shaped like a butterfly, with a right lobe and a left lobe. The isthmus is a thin piece of tissue that connects the two lobes. It…

Childhood Thyroid Cancer Treatment (PDQ®): Treatment – Patient Information [NCI]

This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http://cancer.gov or call 1-800-4-CANCER.

General Information About Childhood Thyroid Cancer

Thyroid cancer is a disease in which malignant (cancer) cells form in the tissues of the thyroid gland.

The thyroid is a gland at the base of the throat near the trachea (windpipe). It is shaped like a butterfly, with a right lobe and a left lobe. The isthmus is a thin piece of tissue that connects the two lobes. It usually cannot be felt through the skin.

Anatomy of the thyroid and parathyroid glands; drawing shows the thyroid gland at the base of the throat near the trachea. An inset shows the front and back views. The front view shows that the thyroid is shaped like a butterfly, with the right lobe and left lobe connected by a thin piece of tissue called the isthmus. The back view shows the four pea-sized parathyroid glands. The larynx is also shown.
Anatomy of the thyroid and parathyroid glands. The thyroid gland lies at the base of the throat near the trachea. It is shaped like a butterfly, with the right lobe and left lobe connected by a thin piece of tissue called the isthmus. The parathyroid glands are four pea-sized organs found in the neck near the thyroid. The thyroid and parathyroid glands make hormones.

The thyroid uses iodine, a mineral found in some foods and in iodized salt, to help make several hormones. Thyroid hormones do the following:

  • Control heart rate, body temperature, and how quickly food is changed into energy (metabolism).
  • Control the amount of calcium in the blood.

Thyroid nodules may be adenomas or carcinomas.

There are two types of thyroid nodules:

  • Adenomas: Adenomas can grow very large and sometimes make hormones. Adenomas are not cancer but may rarely become malignant (cancer) and spread to the lungs or lymph nodes in the neck.
  • Carcinomas: There are three main types of thyroid carcinoma in children:
    • Papillary. Papillary thyroid carcinoma is the most common type of thyroid cancer in children. It often spreads to the lymph nodes and may also spread to the lung. The prognosis (chance of recovery) for most patients is very good.
    • Follicular. Follicular thyroid carcinoma often spreads to the bone and lung. It rarely spreads to the lymph nodes. The prognosis for most patients is very good.
    • Medullary. Medullary thyroid carcinoma forms from parafollicular C cells in the thyroid. It is usually linked to a certain inherited change in the RETgene and multiple endocrine neoplasia type 2 (MEN 2) syndrome. It occurs most often in children aged 4 years and younger and may have spread to other parts of the body at the time of diagnosis.

Papillary and follicular thyroid cancer are sometimes called differentiated thyroid cancer. Medullary and anaplastic thyroid cancer are sometimes called poorly differentiated or undifferentiated thyroid cancer. Anaplastic thyroid cancer is very rare in children and not discussed in this summary.

Thyroid nodules may be found during a routine medical exam and are usually not cancer.

Your child’s doctor may find a lump (nodule) in your child’s thyroid during a routine medical exam. A thyroid nodule is an abnormal growth of thyroid cells in the thyroid. Nodules may be solid or fluid -filled.

When a thyroid nodule is found, an ultrasound of the thyroid and a fine-needle aspiration biopsy are often done to check for signs of cancer. Blood tests to check thyroid hormone levels and for anti-thyroid antibodies in the blood may also be done. This is to check for other types of thyroid disease.

Thyroid nodules usually don’t cause symptoms or need treatment. Sometimes the thyroid nodules become large enough that it is hard to swallow or breathe and more tests and treatment are needed. Only one in five thyroid nodules become cancer.

Being exposed to radiation or having certain genetic syndromes can affect the risk of thyroid cancer.

Anything that increases your risk 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. Talk with your doctor if you think your child may be at risk.

Risk factors for childhood thyroid cancer include the following:

  • Being exposed to radiation, such as from diagnostic tests, radiation treatment, or radiation in the environment.
  • Having a family history of thyroid cancer.
  • Having certain genetic syndromes, such as the following:
    • Multiple endocrine neoplasia type 2A (MEN2A) syndrome.
    • Multiple endocrine neoplasia type 2B (MEN2B) syndrome.
    • APC-associated polyposis.
    • DICER1 syndrome.
    • Carney complex.
    • PTENhamartoma tumor syndrome.
    • Werner syndrome.

Medullary thyroid cancer is sometimes caused by a change in a gene that is passed from parent to child.

The genes in cells carry hereditary information from parent to child. A certain change in the RET gene that is passed from parent to child (inherited) may cause medullary thyroid cancer.

There is a genetic test that is used to check for the changed gene. The patient is tested first to see if he or she has the changed gene. If the patient has it, other family members may also be tested to find out if they have an increased risk of medullary thyroid cancer. Family members, including young children, who have the changed gene may have a thyroidectomy (surgery to remove the thyroid). This can decrease the chance of developing medullary thyroid cancer.

Signs of thyroid cancer include a swelling or lump in the neck.

Sometimes thyroid tumors do not cause any signs or symptoms. These and other signs and symptoms may be caused by papillary or follicular thyroid cancer or by other conditions.

Check with your child’s doctor if your child has any of the following:

  • A lump in the neck.
  • A lump near the collarbone that does not hurt.
  • Trouble breathing.
  • Trouble swallowing.
  • Hoarseness or a change in the voice.
  • Hyperthyroidism (irregular heartbeat, shakiness, weight loss, trouble sleeping, frequent bowel movements, and sweating).

These and other signs and symptoms may be caused by medullary thyroid cancer or by other conditions.

Check with your child’s doctor if your child has any of the following:

  • Bumps on the lips, tongue, or eyelids that do not hurt.
  • Trouble making tears.
  • Constipation.
  • Marfan syndrome (being tall and thin, with long arms, legs, fingers, and toes).

Tests that examine the thyroid, neck, and blood are used to detect (find) and diagnose thyroid 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 (nodules) or swelling in the neck, voice box, and lymph nodes, and anything else that seems unusual. A history of the patient’s health habits and past illnesses and treatments will also be taken.
  • Thyroid function test: The blood is checked for abnormal levels of thyroid-stimulating hormone (TSH). TSH is made by the pituitary gland in the brain. It stimulates the release of thyroid hormone and controls how fast follicular thyroid cells grow. The blood may also be checked for high levels of calcitonin (a hormone made by the thyroid that decreases the amount of calcium in the blood).
  • Thyroglobulin test: The blood is checked for the amount of thyroglobulin, a protein made by the thyroid gland. Thyroglobulin levels are low or absent with normal thyroid function but may be higher with thyroid cancer or other conditions.
  • RET gene test: A laboratory test in which a sample of blood or tissue is tested for a change in the RET gene. This test is done for children who may have medullary thyroid cancer.
  • Ultrasound exam: A procedure in which high-energy sound waves (ultrasound) are bounced off internal tissues or organs in the neck and make echoes. The echoes form a picture of body tissues called a sonogram. The picture can be printed to be looked at later. This procedure can show the size of a thyroid nodule and whether it is solid or a fluid-filled cyst. Ultrasound may be used to guide a fine-needle aspiration biopsy. A complete ultrasound exam of the neck is done before surgery.
  • CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, such as the neck, 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.
    Computed tomography (CT) scan of the head and neck; drawing shows a child lying on a table that slides through the CT scanner, which takes x-ray pictures of the inside of the head and neck.
    Computed tomography (CT) scan of the head and neck. The child lies on a table that slides through the CT scanner, which takes x-ray pictures of the inside of the head and neck.
  • Fine-needle aspiration biopsy of the thyroid: The removal of thyroid tissue using a thin needle. The needle is inserted through the skin into the thyroid. Several tissue samples are removed from different parts of the thyroid. A pathologist views the tissue samples under a microscope to look for cancer cells. Because the type of thyroid cancer can be hard to diagnose, patients should ask to have biopsy samples checked by a pathologist who has experience diagnosing thyroid cancer.
  • Surgical biopsy: The removal of the thyroid nodule or one lobe of the thyroid during surgery so the cells and tissues can be viewed under a microscope by a pathologist to check for signs of cancer. Because the type of thyroid cancer can be hard to diagnose, patients should ask to have biopsy samples checked by a pathologist who has experience diagnosing thyroid cancer.

Certain factors affect prognosis (chance of recovery).

The prognosis (chance of recovery) depends on the following:

  • The age of the child at the time of diagnosis.
  • The type of thyroid cancer.
  • The size of the tumor.
  • Whether the tumor has spread to lymph nodes or other parts of the body at the time of diagnosis.
  • The child’s general health.

Stages of Thyroid Cancer

After thyroid cancer has been diagnosed, tests are done to find out if cancer cells have spread within the thyroid, to the area around the thyroid, or to other parts of the body.

To plan treatment, it is important to know whether cancer cells have spread within the thyroid, to the area around the thyroid, or to other parts of the body.

The following tests and procedures may be done to find out if cancer cells have spread:

  • CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, such as the chest, abdomen, and brain, 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.
    Computed tomography (CT) scan of the abdomen; drawing shows a child lying on a table that slides through the CT scanner, which takes x-ray pictures of the inside of the abdomen.
    Computed tomography (CT) scan of the abdomen. The child lies on a table that slides through the CT scanner, which takes x-ray pictures of the inside of the abdomen.
  • MRI (magnetic resonance imaging) with gadolinium: A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the body, such as the chest. A substance called gadolinium is injected into a vein. The gadolinium collects around the cancer cells so they show up brighter in the picture. This procedure is also called nuclear magnetic resonance imaging (NMRI).
  • 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.
  • Thyroid scan: A small amount of a radioactive substance is swallowed or injected. The radioactive material collects in the thyroid gland. A special camera linked to a computer detects the radiation given off and makes pictures that show how the thyroid looks and functions. If the amount of thyroid-stimulating hormone in the child’s blood is low, a scan to make images of the thyroid may be done before surgery.
  • Sentinel lymph node biopsy: The removal of the sentinel lymph node during surgery. The sentinel lymph node is the first lymph node in a group of lymph nodes to receive lymphatic drainage from the primary tumor. It is the first lymph node the cancer is likely to spread to from the primary tumor. A radioactive substance and/or blue dye is injected near the tumor. The substance or dye flows through the lymph ducts to the lymph nodes. The first lymph node to receive the substance or dye is removed. A pathologist views the tissue under a microscope to look for cancer cells. If cancer cells are not found, it may not be necessary to remove more lymph nodes. Sometimes, a sentinel lymph node is found in more than one group of nodes.

There are three ways that cancer spreads in the body.

Cancer can spread through tissue, the lymph system, and the blood:

  • 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.

When cancer spreads to another part of the body, it is called metastasis. Cancer cells break away from where they began (the primary tumor) and travel through the lymph system or blood.

  • 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.

Recurrent Childhood Thyroid Cancer

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

Treatment Option Overview

There are different types of treatment for patients with thyroid 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 thyroid cancer should have their treatment planned by a team of doctors who are experts in treating childhood cancer.

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 professionals who are experts in treating children with cancer and who specialize in certain areas of medicine. This may include the following specialists and others:

  • Pediatrician.
  • Pediatric surgeon.
  • Radiation oncologist.
  • Pathologist.
  • Pediatric nurse specialist.
  • Social worker.
  • Rehabilitation specialist.
  • Psychologist.
  • Child-life specialist.

Four types of standard treatment are used:

Surgery

Surgery is the most common treatment for thyroid cancer. One of the following procedures may be used:

  • Total thyroidectomy: Removal of the whole thyroid. Lymph nodes near the cancer may also be removed and checked under a microscope for signs of cancer. In children, a total thyroidectomy is usually done.
  • Near-total thyroidectomy: Removal of all but a very small part of the thyroid. Lymph nodes near the cancer may also be removed and checked under a microscope for signs of cancer.

Radioactive iodine therapy

Follicular and papillary thyroid cancers are sometimes treated with radioactive iodine (RAI) therapy. RAI therapy may be given to children after surgery to kill any thyroid cancer cells that were not removed or to children whose tumor cannot be removed by surgery. RAI is taken by mouth and collects in any remaining thyroid tissue, including thyroid cancer cells that have spread to other places in the body. Because only thyroid tissue takes up iodine, the RAI destroys thyroid tissue and thyroid cancer cells without harming other tissue. Before a full treatment dose of RAI is given, a small test dose is given to see if the tumor takes up the iodine.

Targeted therapy

Targeted therapy is a type of treatment that uses drugs or other substances to identify and attack specific cancer cells without harming normal cells.

Tyrosine kinase inhibitor therapy (TKI) is a type of targeted therapy that blocks signals needed for tumors to grow. Vandetanib is a TKI used to treat children with advanced medullary thyroid cancer.

Targeted therapy is being studied for the treatment of childhood thyroid cancer that has recurred (come back).

Hormone replacement therapy

Hormones are substances made by glands in the body and circulated in the bloodstream. After treatment for thyroid cancer, the thyroid is not able to make enough thyroid hormone. Patients are given thyroid hormone replacement pills for the rest of their lives.

New types of treatment are being tested in clinical trials.

Information about clinical trials is available from the NCI website.

Treatment for childhood thyroid cancer may cause side effects.

For information about side effects that begin during treatment for cancer, see our Side Effects page.

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 supported by NCI can be found on NCI’s clinical trials search webpage. Clinical trials supported by other organizations can be found on the ClinicalTrials.gov website.

Follow-up tests may be needed.

It is common for thyroid cancer to recur (come back), especially in children younger than 10 years and those with cancer in the lymph nodes. Ultrasound and thyroglobulin tests may be done from time to time to check if the cancer has recurred. Lifelong follow-up of thyroid hormone levels in the blood is needed to make sure the right amount of hormone replacement therapy (HRT) is being given. Talk with your child’s doctor to find out how often these tests need to be done.

Treatment Options for Childhood Thyroid Cancer

For information about the treatments listed below, see the Treatment Option Overview section.

Treatment of Childhood Papillary and Follicular Thyroid Cancer

Treatment of papillary and follicular thyroid carcinoma in children may include the following:

  • Surgery to remove all or part of the thyroid gland and lymph nodes with cancer, followed by radioactive iodine (RAI) therapy to kill any thyroid cancer cells that are left. Hormone replacement therapy (HRT) is given to make up for the lost thyroid hormone.
  • RAI therapy alone may be given to children whose tumor cannot be removed by surgery. Hormone replacement therapy (HRT) is given to make up for the lost thyroid hormone.

Within 12 weeks of surgery, tests are done to find out if thyroid cancer remains in the body. These may include thyroglobulin tests and RAI scans. A radioactive iodine scan (RAI scan) is done to find areas in the body where thyroid cancer cells that were not removed during surgery may be dividing quickly. RAI is used because only thyroid cells take up iodine. A very small amount of RAI is swallowed, travels through the blood, and collects in thyroid tissue and thyroid cancer cells anywhere in the body. Further treatment depends on whether cancer cells remain in the body:

  • If no cancer cells are found outside the thyroid, a larger dose of RAI is given to destroy any remaining thyroid tissue.
  • If cancer remains in the lymph nodes or has spread to other parts of the body, an even larger dose of RAI is given to destroy any remaining thyroid tissue and thyroid cancer cells.
  • A whole-body SPECT (single photon emission computed tomography) scan may be done 4 to 7 days after treatment with RAI. A SPECT scan is a procedure to find malignant tumor cells in the body. A small amount of a radioactive substance is injected into a vein. As the substance travels through the blood, a camera rotates around the body and takes pictures. A computer uses the pictures to make a 3-dimensional (3-D) image of areas inside the body. There will be increased blood flow and more activity in areas where cancer cells are growing. These areas will show up brighter in the picture. This procedure may be done just before or after a CT scan.

See the Multiple Endocrine Neoplasia Syndromes section of the Unusual Cancers of Childhood Treatment summary for more information.

Use our clinical trial search to find NCI-supported cancer clinical trials that are accepting patients. You can search for trials based on the type of cancer, the age of the patient, and where the trials are being done. General information about clinical trials is also available.

Treatment of Childhood Medullary Thyroid Cancer

Treatment of medullary thyroid carcinoma in children may include the following:

  • Surgery to remove the tumor.
  • Targeted therapy with a tyrosine kinase inhibitor (vandetanib) for cancer that has spread to other parts of the body.

Use our clinical trial search to find NCI-supported cancer clinical trials that are accepting patients. You can search for trials based on the type of cancer, the age of the patient, and where the trials are being done. General information about clinical trials is also available.

Treatment of Progressive or Recurrent Childhood Thyroid Cancer

Treatment of progressive or recurrent papillary and follicular thyroid carcinoma in children may include the following:

  • Radioactive iodine (RAI) therapy.
  • A clinical trial that checks a sample of the patient’s tumor for certain gene changes. The type of targeted therapy that will be given to the patient depends on the type of gene change.

Treatment of progressive or recurrent medullary thyroid carcinoma in children may include the following:

  • Targeted therapy with a tyrosine kinase inhibitor (vandetanib).
  • A clinical trial that checks a sample of the patient’s tumor for certain gene changes. The type of targeted therapy that will be given to the patient depends on the type of gene change.

Use our clinical trial search to find NCI-supported cancer clinical trials that are accepting patients. You can search for trials based on the type of cancer, the age of the patient, and where the trials are being done. General information about clinical trials is also available.

To Learn More About Thyroid Cancer

For more information from the National Cancer Institute about thyroid cancer, see the following:

  • Thyroid Cancer Home Page
  • Targeted Cancer Therapies
  • Genetic Testing for Inherited Cancer Susceptibility Syndromes
  • MyPART – My Pediatric and Adult Rare Tumor Network

For more childhood cancer information and other general cancer resources, see the following:

  • About Cancer
  • 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
  • Staging
  • Coping with Cancer
  • Questions to Ask Your Doctor about Cancer
  • For Survivors and Caregivers

About This PDQ Summary

About PDQ

Physician Data Query (PDQ) is the National Cancer Institute’s (NCI’s) comprehensive cancer information database. The PDQ database contains summaries of the latest published information on cancer prevention, detection, genetics, treatment, supportive care, and complementary and alternative medicine. Most summaries come in two versions. The health professional versions have detailed information written in technical language. The patient versions are written in easy-to-understand, nontechnical language. Both versions have cancer information that is accurate and up to date and most versions are also available in Spanish.

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Purpose of This Summary

This PDQ cancer information summary has current information about the treatment of childhood thyroid cancer. It is meant to inform and help patients, families, and caregivers. It does not give formal guidelines or recommendations for making decisions about health care.

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Editorial Boards write the PDQ cancer information summaries and keep them up to date. These Boards are made up of experts in cancer treatment and other specialties related to cancer. The summaries are reviewed regularly and changes are made when there is new information. The date on each summary (“Updated”) is the date of the most recent change.

The information in this patient summary was taken from the health professional version, which is reviewed regularly and updated as needed, by the PDQ Pediatric Treatment Editorial Board.

Clinical Trial Information

A clinical trial is a study to answer a scientific question, such as whether one treatment is better than another. Trials are based on past studies and what has been learned in the laboratory. Each trial answers certain scientific questions in order to find new and better ways to help cancer patients. During treatment clinical trials, information is collected about the effects of a new treatment and how well it works. If a clinical trial shows that a new treatment is better than one currently being used, the new treatment may become “standard.” Patients may want to think about taking part in a clinical trial. Some clinical trials are open only to patients who have not started treatment.

Clinical trials can be found online at NCI’s website. For more information, call the Cancer Information Service (CIS), NCI’s contact center, at 1-800-4-CANCER (1-800-422-6237).

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The best way to cite this PDQ summary is:

PDQ® Pediatric Treatment Editorial Board. PDQ Childhood Thyroid Cancer Treatment. Bethesda, MD: National Cancer Institute. Updated <MM/DD/YYYY>. Available at: https://www.cancer.gov/types/thyroid/patient/child-thyroid-treatment-pdq. Accessed <MM/DD/YYYY>.

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Last Revised: 2019-05-16


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