Ten years of using a mobile phone regularly will not likely result in brain cancer, researchers said on Tuesday. The study, published in the online version of The British Journal of Cancer, studied 678 people with acoustic neuroma and compared their use of mobile phones over a 10-year period with a group of 3,553 people who had not developed the condition. Researchers found no link between the risk of developing a tumour and the number of years for which mobile phones had been used. But amid public concern about a possible link, the scientists who conducted the largest study so far on the subject said they could not rule out a higher risk over a longer period.