New blood test could help detect eight common cancers before they spread

Researchers believe CancerSEEK will save thousands of lives and hope it will be widely available in a few years

Researchers have said a groundbreaking new blood test that can detect eight common types of cancer before they spread will save countless lives.

They said "liquid biopsy" - developed in the US - would be a game-changer in the fight against cancer, and hoped it could be widely available within a few years.