It is hoped that Grail’s Galleri test, which is based on identifying circulating tumour DNA, will provide early diagnosis and save many lives.
What are they? Tumour markers are substances, usually proteins, produced by the body in response to cancer growth or by cancer tissue itself. The detection and measurement of tumour markers in blood plasma, urine or tissue can help to detect and aid diagnosis of some types of cancer, predict and monitor response to treatment and detect recurrence...