London: The use of mobile phones for long periods may trigger mouth cancer, shows a study by researchers in Israel.
Previous studies had generated conflicting results. While some researchers had said they found a link between cancer and excess mobile phone use, a few scientists had rejected the claim.
In the new study, scientists looked at the lifestyles of 402 people with benign mouth tumours and 56 with malignant ones. They were compared to a control group of 1,266 people.
The study found that five years of frequent use increased the chances of developing a tumour in the mouth by around 50 percent compared with people who had never used one, reported the online edition of the Daily Mail.
Those who used mobiles the most were more likely than normal to develop parotid gland tumours, the scientists said.
The parotid is the largest of the salivary glands located in front of the ear. Long-term mobile phone users tended to develop tumours on the same side of the head as the phone was normally held, they said.
People who used mobile phones in rural areas, where the phone has to work harder to make contact with the nearest base station, were found to be at greater risk although the cause of the heightened risk was not established.
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