The cause of primary brain tumors is unknown. Primary brain tumors may be:
Not cancerous (benign)
Invasive (spread to nearby areas)
Brain tumors are classified based on:
The exact site of the tumor
The type of tissue involved
Whether it is cancerous
Brain tumors can directly destroy brain cells. They can also indirectly damage cells by pushing on other parts of the brain. This leads to swelling and increased pressure inside the skull.
Tumors can occur at any age. Many tumors are more common at a certain age. In general, brain tumors in children are very rare.
COMMON TUMOR TYPES
Astrocytomas are usually noncancerous, slow-growing tumors. They commonly develop in children ages 5 through 8. Also called low-grade gliomas, these are the most common brain tumors in children.
Medulloblastomas are the most common type of childhood brain cancer. Most medulloblastomas occur before age 10.
Ependymomas are a type of childhood brain tumor that can be benign (non-cancerous) or malignant (cancerous). The location and type of ependymoma determine the type of therapy needed to control the tumor.
Brainstem gliomas are very rare tumors that occur almost only in children. The average age at which they develop is about 6. The tumor may grow very large before causing symptoms.
Symptoms may be subtle and only gradually become worse. Or they may occur very quickly.
Headaches are often the most common symptom. But only very rarely do children with headaches have a tumor. Headache patterns that may occur with brain tumors include:
Headaches that are worse when waking up in the morning and go away within a few hours
Headaches that get worse with coughing or exercise, or with a change in body position
Headaches that occur while sleeping and with at least one other symptom such as vomiting or confusion
Sometimes the only symptoms of brain tumors are mental changes, which may include:
Changes in personality and behavior
Unable to concentrate
Problems with reasoning
Other possible symptoms are:
Gradual loss of movement or feeling in an arm or leg
Hearing loss with or without dizziness
Unexpected vision problem (especially if it occurs with a headache), including vision loss (usually of peripheral vision) in one or both eyes, or double vision
Problems with balance
Weakness or numbness
Exams and Tests
The health care provider will perform a physical exam. Infants may have the following physical signs:
Treatment depends on the size and type of tumor and the child's general health. The goals of treatment may be to cure the tumor, relieve symptoms, and improve brain function or the child's comfort.
Surgery is needed for most primary brain tumors. Some tumors may be completely removed. In cases where the tumor cannot be removed, surgery may help reduce pressure and relieve symptoms. Chemotherapy or radiation therapy may be used for certain tumors.
The following are treatments for specific types of tumors:
Astrocytoma -- Surgery to remove the tumor is the main treatment. Chemotherapy and/or radiation therapy may also be necessary.
Brainstem gliomas -- Surgery is usually not possible because of the tumor's location in the brain. Radiation is used to shrink the tumor and prolong life.
Ependymomas -- Treatment includes surgery. Radiation and chemotherapy may be necessary.
Medulloblastomas -- Surgery alone does not cure this type of tumor. Chemotherapy with or without radiation is often used in combination with surgery.
Medicines used to treat primary brain tumors in children include:
Corticosteroids to reduce brain swelling
Diuretics (water pills) to reduce brain swelling and pressure
Anticonvulsants to reduce or prevent seizures
Comfort measures, safety measures, physical therapy, occupational therapy, and other such steps may be required to improve quality of life.
You can ease the stress of illness by joining a cancer support group. Sharing with others who have common experiences and problems can help you and your child not feel alone.
How well the child does depends on many things, including the exact type of tumor. In general, about 3 of 4 children survive at least 5 years after being diagnosed.
Long-term brain and nervous system problems may result from the tumor itself or from treatment. Children may have problems with attention, concentration, or memory. They may also have problems processing information, planning, insight, or initiative or desire to do things.
Children younger than age 7, especially younger than age 3, seem to be at greatest risk of these complications.
Parents need to make sure that children receive support services at home and at school.
When to Contact a Medical Professional
Call a health care provider if a child develops headaches that do not go away or other symptoms of a brain tumor.
Go to the emergency room if a child develops any of the following:
Change in behavior
Severe headache of unknown cause
Seizure of unknown cause
Kuttesch JF Jr, Rush SA, Ater JL. Brain tumors in childhood. In: Kliegman RM, Stanton BF, St. Geme JW III, et al., eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, Pa: Elsevier Saunders; 2011:chap 491.
National Cancer Institute: PDQ Childhood Brain and Spinal Cord Tumors Treatment Overview. Bethesda, Md: National Cancer Institute. Date last modified 05/29/2013. Available at: http://www.cancer.gov/cancertopics/pdq/treatment/childbrain/healthprofessional. Accessed October 18, 2013.
Wilne S, Koller K, Collier J, Kennedy C, Grundy R, Walker D. The diagnosis of brain tumours in children: a guideline to assist healthcare professionals in the assessment of children who may have a brain tumour. Arch Dis Child. 2010;95:534-539.
Adam S. Levy, MD, Division of Pediatric Hematology/Oncology, The Children's Hospital at Montefiore, Bronx, NY. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.