April 27, 2017 | Amy, Exhibition Developer, Science Museum

I can't imagine how scary it must be to have cancer treated successfully, but knowing it might come back.

Scientists are working on a new test for recurring lung cancer. They analyse the DNA of a patient's tumour when it's removed by surgery. Blood tests after the patient recovers look for the 'tumour DNA', allowing new treatments to start as early as possible - well before the cancer would show up on scans.

The research is only at a very early stage, but it could have a big impact on cancer treatment.

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Blood sample

Tumours just 0.7 mm long were detected by this blood test.

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Image: Flickr/National Eye Institute

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