Ependymoma is a rare type of tumor that starts in the brain or spinal cord. The brain controls all body functions, such as breathing, heart rate, memory and learning, emotion, and senses. The spinal cord is made up of bundles of nerve fibers that carry messages between the brain and the rest of the body. Together, the brain and spinal cord make up the central nervous system (CNS).

Ependymomas start when cells called ependymal cells grow without control. Ependymal cells line the ventricles and passageways in the brain and spinal cord and make cerebrospinal fluid (CSF), which acts as a cushion to protect the brain and spinal cord from injury.

Ependymomas can spread when the CSF carries ependymoma cells to other parts of the CNS. Ependymomas rarely spread outside the CNS.

Children and adults can get ependymoma, but it is more common in young children. This type of tumor accounts for about 9% of all childhood brain and spinal cord tumors, affecting about 200 children per year in the United States.

There are different types of ependymomas depending on where the tumor is located. There are three main types of ependymoma seen in children:

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Childhood ependymoma is caused by certain changes to the ependymal cell function, especially how they grow and divide into new cells. The exact cause of these cell changes is unknown. To learn more about how cancer develops, see What Is Cancer?

A risk factor is anything that increases the chance of getting a disease. Children with an inherited condition called neurofibromatosis type 2 (NF2) may have an increased risk of developing ependymoma along the optic pathway. Not every child with this risk factor will develop ependymoma. And it will develop in some children who don't have a known risk factor.

Symptoms of ependymoma depend on the child's age and where the tumor has formed. It's important to check with your child's doctor if your child has any symptoms below:

Symptoms of posterior fossa ependymoma in children can include:

Symptoms of supratentorial ependymomas in children can include:

Symptoms of spinal cord ependymomas in children can include:

These symptoms may be caused by conditions other than an ependymoma. The only way to know is to see your child's doctor.

If your child has symptoms that suggest an ependymoma, their doctor will need to find out if these are due to ependymoma or some other problem. The doctor will ask when the symptoms started and how often your child has been having them. They will also ask about your child's personal and family medical history and do a physical exam, including a neurologic exam. Depending on these results, they may recommend other tests. If your child is diagnosed with an ependymoma, the results of these tests will help you and your child's doctor plan treatment.

The tests used to diagnose ependymoma in children may include:

Biopsy

If the diagnostic tests show there may be a brain tumor, a biopsy can be done by removing part of the skull or making a small hole in the skull and using a needle or surgical device to remove a sample of the brain tissue. Sometimes, when a needle is used, it is guided by a computer to remove the tissue sample. A pathologist views the tissue under a microscope to look for cancer cells and determine the grade of the tumor. If cancer cells are found, the doctor will remove as much tumor as safely possible during the same surgery.

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The following laboratory tests may be done on the tissue that was removed during the biopsy:

• Immunohistochemistry uses antibodies to check for certain antigens (markers) in a sample of a patient's tissue. The antibodies are usually linked to an enzyme or a fluorescent dye. After the antibodies bind to a specific antigen in the tissue sample, the enzyme or dye is activated, and the antigen can then be seen under a microscope. This type of test is used to help diagnose cancer and to help tell one type of cancer from another type.
• Next-generation sequencing uses computers to piece together DNA or RNA fragments in order to sequence a person or other organism's entire DNA, large segments of DNA or RNA, or the DNA in specific types of cells from a sample of tissue. Next-generation sequencing can also identify changes in certain areas of the genome or in specific genes. There are many different types of next-generation sequencing methods, including whole-genome sequencing, whole-exome sequencing, multigene panel testing, and transcriptome sequencing. Next-generation sequencing may help researchers understand the cause of certain diseases, such as cancer. Also called massively parallel sequencing and NGS.

Lumbar puncture

Lumbar puncture is a procedure used to collect cerebrospinal fluid (CSF) from the spinal column. This is done by placing a needle between two bones in the spine and into the lining around the spinal cord to remove a sample of CSF. The sample of CSF is checked under a microscope for signs of tumor cells. The sample may also be checked for the amounts of protein and glucose.

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You may want to get a second opinion to confirm your child's diagnosis and treatment plan. If you seek a second opinion, you will need to get medical test results and reports from the first doctor to share with the second doctor. The second doctor will review the pathology report, slides, and scans before giving a recommendation. This doctor may agree with the first doctor, suggest changes to the treatment plan, or provide more information about your child's cancer.

To learn more about choosing a doctor and getting a second opinion, see Finding Health Care Services. You can contact NCI's Cancer Information Service via chat, email, or phone (both in English and Spanish) for help finding a doctor or hospital that can provide a second opinion. For questions you might want to ask at your child's appointments, see Questions to Ask Your Doctor about Cancer. 

Staging is the process of learning the extent of the cancer in the body and is often used to help plan treatment and make a prognosis.

There is no staging system used for childhood ependymoma, but it is given a grade. Tumor grading is based on the World Health Organization (WHO) criteria.

Tumor grade describes how abnormal the cancer cells look under a microscope, how quickly the tumor is likely to grow and spread, and how likely the tumor is to come back after treatment. The WHO criteria also classifies ependymomas by their location in the brain or spinal cord (see the section on Types of childhood ependymoma) and the tumor's molecular or genetic features.

Low-grade (grade I) cancer cells look more like normal cells than high-grade (grades II and III) cancer cells. Grade I cancer cells also tend to grow and spread more slowly than grade II and III cancer cells.

Childhood ependymoma often comes back after treatment, sometimes as long as 15 years after the initial treatment. The tumor commonly comes back at the original cancer site, although it can also spread to areas near the original site. It is rare for ependymoma to spread to areas far from the original cancer site.

A pediatric oncologist, a doctor who specializes in treating children with cancer, oversees treatment for childhood ependymoma. The pediatric oncologist works with other health care providers who are experts in treating children with brain tumors and also specialize in other areas of medicine. Other specialists may include:

There are different types of treatment for children and adolescents with ependymoma. You and your child's care team will work together to decide treatment. Many factors will be considered, such as where the cancer is located, your child's age and overall health, and the type and grade of the ependymoma.

Your child's treatment plan will include information about the cancer, the goals of treatment, treatment options, and the possible side effects. It will be helpful to talk with your child's care team before treatment begins about what to expect. For help every step of the way, see our booklet, Children with Cancer: A Guide for Parents.

Types of treatment your child might have include:

Treatment of newly diagnosed childhood ependymoma in the brain or brain stem includes surgery.

After surgery, the plan for further treatment depends on:

When the tumor is completely removed and cancer cells have not spread, treatment may include radiation therapy.

When part of the tumor remains after surgery, but cancer cells have not spread, treatment may include:

When cancer cells have spread within the brain and spinal cord, treatment may include:

Treatment for children younger than 1 year of age may include:

Radiation therapy is not given to children until they are older than 1 year.

Treatment of newly diagnosed childhood myxopapillary spinal ependymoma (grade 2) is surgery. Sometimes radiation therapy is given after surgery.

Treatment of newly diagnosed childhood nonmyxopapillary spinal ependymoma is surgery. Sometimes radiation therapy is given after surgery for children with grade 2 or grade 3 tumors.

Treatment of recurrent childhood ependymoma may include:

If your child has been diagnosed with ependymoma, you likely have questions about how serious the cancer is and your child's chances of survival. The estimate of how the disease will go for your child is called prognosis. Your child's prognosis depends on many factors, including:

Prognosis also depends on whether radiation therapy was given, the type and treatment dose, and whether chemotherapy alone was given.

No two people are alike, and responses to treatment can vary greatly. Your child's cancer care team is in the best position to talk with you about your child's prognosis.

Cancer treatments can cause side effects. Which side effects your child might have depends on the type of treatment they receive, the dose, and how their body reacts. Talk with your child's treatment team about which side effects to look for and ways to manage them.

To learn more about side effects that begin during treatment for cancer, see Side Effects.

Problems from cancer treatment that begin 6 months or later after treatment and continue for months or years are called late effects. Late effects of treatment for childhood ependymoma may include the following:

Some late effects may be treated or controlled. It is important to talk with your child's doctors about the effects cancer treatment can have on your child. To learn more, see Late Effects of Treatment for Childhood Cancer.

As your child goes through treatment, they will have follow-up tests or check-ups. Some of the tests that were done to diagnose the cancer may be repeated 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.

Childhood ependymoma may come back as long as 15 years or more after initial treatment. So once your child finishes treatment, they will continue to have certain tests from time to time. The results of these tests can show if your child's condition has changed or if the cancer has come back.

Your child may receive an MRI of the brain and spinal cord at the following intervals:

When a child has cancer, every member of the family needs support. Taking care of yourself during this difficult time is important. Reach out to your child's treatment team and to people in your family and community for support. To learn more, see Support for Families When a Child Has Cancer and the booklet Children with Cancer: A Guide for Parents. 

For more information about childhood brain tumors, see the following:

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