A new study has ruled out any possible links between mobile phone usage and an increased risk of brain tumours .
The Japanese research is the first to investigate the effects of handset radiation levels on different areas of the brain.
The researchers, led by Prof Naohito Yamaguchi, of Tokyo Women's Medical University, claimed that no connection between the length of phone use and the three most common types of brain tumour could be identified.
The findings are the latest in an ever-increasing amount of evidence ruling out a link between mobile phones and cancer .
The study assessed the level of electromagnetic radiation exposure and the average number of hours of use each day for 322 brain cancer patients and 683 healthy people in Tokyo before checking the brain areas most likely to be affected.
The research team found regular use of the mobile devices did not significantly affect the risk of developing the three types of tumour - glioma, meningioma or pituitary adenoma - which together make up 85 per cent of brain cancers .
Prof Yamaguchi, whose findings have been reported in the British Journal of Cancer, explained that previous studies investigating the link between mobiles and cancer had been faced with the challenge of how to accurately estimate the amount of "exposure different parts of the brain receive".
"Using our newly developed and more accurate techniques, we found no association between mobile phone use and cancer," she concluded.
However, charity group Cancer Research UK claimed the long-term effects of mobile phone usage were still unknown as people have only been using mobiles intensively for around ten years.
Mobile Phones Do Not Increase Risk Of Brain Cancer
Wed, 06 Feb 2008
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