Ependymoma

A tumor that starts in the cells lining the fluid spaces of the brain and spine.

What an ependymoma is

Your brain and spinal cord have spaces filled with fluid. Those spaces are lined with cells called ependymal cells. An ependymoma starts in that lining.

Because it grows in the fluid spaces, it can block the flow of fluid. That build-up causes many of the early symptoms, like headaches or feeling sick.

Where it turns up

An ependymoma can grow in the brain or in the spinal cord. It happens in both children and adults, and where it sits often differs between them.

Doctors also look at gene changes in the tumor now, because two ependymomas that look alike under a microscope can behave differently.

What to ask your team

This is not medical advice. It explains research in plain words. Your care team knows your case. Talk with them before you make any decision about your treatment.

Last reviewed: August 16, 2026

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