What are primitive neuroectodermal tumors?
A person with primitive neuroectodermal tumors has abnormal cells in the brain that multiply out of control. These cells can form tumors and spread to other parts of the body. The cause for primitive neuroectodermal tumors is unknown, but genetics may play a role in determining risk. Primitive neuroectodermal tumors are rare.

What are the symptoms of primitive neuroectodermal tumors?
The most common symptoms of primitive neuroectodermal tumors include slowly worsening headaches, nausea, and vomiting. Additional symptoms of a primitive neuroectodermal tumor may include a change in vision, dizziness, difficulty speaking, difficulty walking, hearing loss, memory loss, numbness in one arm or leg, weakness in one arm or leg, or facial weakness.

How does the doctor treat primitive neuroectodermal tumors?
Treatment for primitive neuroectodermal tumors may include anticonvulsant medications, oral corticosteroid medications, chemotherapy, radiation therapy, or surgery.