Dr. Joel Policzer checks on his patient, Lillian Landry, in the hospice wing of an Florida hospital in 2009. A new study found that many terminally ill cancer patients don't fully understand their prognosis. J. Pat Carter/AP hide caption

itoggle caption J. Pat Carter/AP

Kristen Miller talks over the risks and benefits of colonoscopy with Stephen Hanauer, chief of gastroenterology at the University of Chicago Medical Center. Brian Kersey/AP hide caption

itoggle caption Brian Kersey/AP