Blood test to detect cancer

Scientists at the Institute of Cancer Research in London say that a blood test may be able to save lives by finding cancers that have started to grow again after treatment. However, they say that may still be some way to go before there was a test that could be used in hospitals. Kat Arney from Cancer Research UK explains what this discovery means:
(Photo: Artwork showing a molecular model of breast cancer. Credit: Science Photo Library)