Metastasis is the spread of cancercells to new areas of the body. A metastatic cancer, or metastatic tumour, is one which has spread from the primary site into different areas of the body.
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Image by Peter Artymiuk via the Wellcome Collection. Depicts the shadow of a DNA double helix, on a background that shows the fluorescent banding of the output from a DNA sequencing machine.
A highly-sensitive DNA blood test could help detect cancer years before tumours are detected...
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