A new discovery means that a DNA test to detect the early signs of bowel cancer could be one step closer.

While not all polyps in the bowel become cancerous it is thought almost all bowel cancers develop from polyps.
The Cambridge study analysed 261 samples from patients with benign polyps or bowel cancer.
In particular it looked at what are called DNA methylation patterns - a key process in cell development.
The researchers at Cancer UK's Cambridge Research Institute at Cambridge University say that DNA methylation is essential for life.
In healthy cells a compound called a methyl group is tagged to DNA where it acts as a "red light", preventing certain genes from producing proteins.
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Study's lead author Dr Ashraf Ibrahim says studying molecular changes could make diagnosing bowel cancer much simpler in the future.
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"The majority of bowel cancers develop from benign polyps that turn cancerous - and this crucial research deepens our understanding of the molecular changes behind this development.
"This first step in detecting molecular 'flags' for bowel cancer, could, one day, lead to a simple test to search DNA for the early signs of the disease."
The study appears in the BMJ Journal Gut.
Source-ANI