One company is promoting its blood test to people with no signs of cancer as a way to detect tumors in the pancreas, ovaries and other sites that have no recommended screening method.
Joyce Ares had just turned 74 and was feeling fine when she agreed to give a blood sample for research. So she was surprised when the screening test came back
Screening finds some cancers that don't need to be cured. The flip side? Many dangerous cancers grow so fast they elude screening and prove deadly anyway.