How does cancer develop? Learn how cancer grows and about mutation of cancer cells with Cancer Research UK.

Watch this video to find out how cancer develops or learn more on our website: http://www.cancerresearchuk.org/about-cancer/what-is-cancer/how-cancers-grow

The video explains how cancer develops when DNA is damaged, allowing a cell to multiply out of control. This animation shows what happens to the normal controls in a cell when cancer starts.
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