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What is childhood visual pathway glioma?

Childhood visual pathway glioma is a type of brain tumor in which cancer (malignant) cells begin to grow in the tissues of the brain. The brain controls memory and learning, the senses (hearing, sight, smell, taste, and touch), and emotion. It also controls other parts of the body, including muscles, organs, and blood vessels. Other than leukemia or lymphoma, brain tumors are the most common type of cancer that occurs in children.

Gliomas are a type of astrocytoma, tumors that start in brain cells called astrocytes. A visual pathway glioma occurs along the nerve that sends messages from the eye to the brain (the optic nerve). Visual pathway gliomas are visual pathway tumors. They may grow rapidly or slowly, depending on the grade of the tumor.

Like most cancer, childhood brain tumor is best treated when it is found (diagnosed) early. If your child has symptoms, the doctor may order a computed tomographic (CT) scan, a special x-ray that uses a computer to make a picture of your child’s brain. A magnetic resonance imaging (MRI) scan, which uses magnetic waves to make a picture of your child’s brain, may also be done.

Often, surgery is required to see whether there is a brain tumor and to tell what type of tumor it is. The doctor may cut out a piece of tissue from the brain and look at it under a microscope. This is called a biopsy.

There are many types of brain tumors in children and the chance of recovery (prognosis) depends on the type of tumor, where it is located within the brain, and your child’s age and general health.

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