Inside brain tumors

Senator Edward Kennedy is one of about 9,000 people who are diagnosed with the malignant brain tumors each year. Researchers have come up with a number of new therapies against this form of cancer. But long term survival has not improved much over the years.

Marc Chamberlin, MD: Professor of neurology, Seattle Cancer Care Alliance at the University of Washington.

John Schwerkoske, MD: Medical oncologist with United Hospitals in St. Paul