Doctors Propose New Cancer Definitions

Aired: 7/30/2013 | 0:08:43 | Clip
A panel of doctors and scientists proposed a change to the definition of cancer, in hopes of shifting the way we think about and treat the disease. Gwen Ifill discusses the recommendation with Dr. Barnett Kramer of the National Cancer Institute and Dr. Larry Norton of the Memorial Sloan-Kettering Cancer Center.