After having a seizure, Senator Ted Kennedy was sent to the hospital over the weekend.

The world now knows that seizure to have been caused by a brain tumor. Kennedy is now out of the hospital and back at his Cape Cod home.

Brain cancer isn't as rare as you might think.

The National Cancer Institute estimates nearly 22,000 new cases will be diagnosed this year alone.

But there are a few signs and symptoms people need to be aware of.

"Unfortunately, the most common symptoms are non-specific, things like headaches or lack of energy. However, neurologic deterioration like differences with speech or understanding or difficulty moving one side of the body or the other or seizures definitely should prompt an MRI scan," said Dr. L. Gerard Toussaint III with the Texas Brain and Spine Institute and also the Texas A&M Health Science Center College of Medicine.

For more information on brain tumors click on the link below: