October 26, 2007 – Those who have used cell phones for more than ten years are said to be twice as likely to develop certain brain tumors, both benign and malignant, than those who have used them for a shorter period of time.
A team of Swedish researchers analyzed 11 studies published in recent years on the effects of cell phone use for more than ten years on the brain.
Four studies looked more specifically at the acoustic neuroma, a benign tumor. According to the results of three of these studies, the risk of developing a neuroma is 2.4 times higher in those who have used a cell phone for more than 10 years than other cell phone users. And this, on the side of the ear on which the phone is worn.
The fourth study does not make it possible to conclude that there is an increased risk of neuroma. The results, however, indicate the presence of a larger tumor in long-term users who had a neuroma.
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Acoustic neuroma |
A malignant tumor
The researchers also found five studies showing a consistent association between long-term cell phone use and the presence of high-grade glioma, a malignant tumor that is difficult to treat. According to their analysis, the risk of glioma is twice as high in these users than in those who have used cell phones for less than ten years.
The authors are still cautious, however, as these results are based on a low number of long-term users. Pending new data, however, they recommend using cellphones with caution.
Charles Désy – PasseportSanté.net
1. Hardell L, Carlberg M, et al. Long-term use of cellular phones and brain tumors: increased risk associated with use for> or = 10 years, Occup Environ Med. 2007 Sep; 64 (9): 626-32.
