An ependymoma is a tumor that arises from cells that are found lining the ventricular system (areas of the brain or spinal cord where spinal fluid is found).
An optic nerve glioma (also called an optic pathway glioma) is a slow-growing brain tumor that arises in or around the optic nerve, which connects the eye to the brain.
Seizures happen when brain cells fire or “talk” too much, temporarily disrupting the brain’s normal electrical signals. They’re quite common, especially in infants and young children.