Scientists in the region have made a major breakthrough in finding out how prostate cancer starts.
The team from the University of York have confirmed a link between stem cells and the cancer itself.
In years to come the findings of their research could revolutionise the way patients are treated.
You can watch the full report from Claire Montgomery below.
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Sandiford, a former legal secretary originally from Redcar, was convicted of drug smuggling offences and sentenced to death in 2013.
Durham Crown Court heard that one of the male victims suffered a triple-fractured jaw, while left lying in the gutter, unconscious.