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National Cancer Institute is expected to bear on the accuracy and repeat- ability of these results.1
2.Researchers conducted a large battery of laboratory tests to assess the effects of exposure to mobile phone RF on genetic material. These included tests for several kinds of abnormalities, including mutations, chromosomal aberrations, DNA strand breaks, and structural changes in the genetic material of blood cells called lymphocytes. None of the tests showed any effect of the RF except for the micronucleus assay, which detects structural effects on the genetic material. The cells in this assay showed changes after exposure to simulated cell phone radiation, but only after
24hours of exposure. It is possible that exposing the test cells to radia- tion for this long resulted in heating. Since this assay is known to be sensi- tive to heating, heat alone could have caused the abnormalities to occur. The data already in the litera- ture on the response of the micronu- cleus assay to RF are conflicting. Thus
FDA is currently working with gov- ernment, industry, and academic groups to ensure the proper follow- up to these
research recommendations and sci- entific oversight of new
Two other studies of interest have been reported recently in the litera- ture:
•Two groups of 18 people were exposed to simulated mobile phone signals under laboratory conditions while they performed cognitive function tests. There were no changes in the subjects' ability to recall words, numbers, or pictures, or in their spatial memory, but they were able to make choices more quickly in one visual test when they were exposed to simulated mobile phone signals. This was the only change noted among more than 20 variables compared.3
•In a study of 209 brain tumor cases and 425 matched controls, there was no increased risk of brain tumors associated with mobile phone use. When tumors did exist in certain locations, how- ever, they were more likely to be on the side of the head where the mobile phone was used. Because this occurred in only a small num- ber of cases, the increased likeli- hood was too small to be statisti- cally significant.4
In summary, we do not have enough information at this point to assure the public that there are, or are not,
en; VAR issue date: 040413