Motorola MicroTAC Owner's Manual page 75

It is possible that exposing the test cells to radiation for this
long resulted in heating. Since this assay is known to be sen-
sitive to heating, heat alone could have caused the abnor-
malities to occur. The data already in the literature on the
response of the micronucleus assay to RF are conflicting.
Thus, follow-up research is necessary.
FDA is currently working with government, industry, and acad-
emic groups to ensure the proper follow-up to these industry-
funded research findings. Collaboration with the Cellular
Telecommunications Industry Association (CTIA) in particular is
expected to lead to FDA providing research recommendations
and scientific oversight of new CTIA-funded research based on
such recommendations.
Two other studies of interest have been reported recently in the
literature:
1. Two groups of 18 people were exposed to simulated mobile
phone signals under laboratory conditions while they per-
formed 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.
2. In a study of 209 brain tumor cases and 425 matched con-
trols, there was no increased risk of brain tumors associated
with mobile phone use. When tumors did exist in certain
locations, however, 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 number of cases, the increased
likelihood was too small to be statistically significant.
In summary, we do not have enough information at this point
to assure the public that there are, or are not, any low incident
health problems associated with use of mobile phones. FDA
continues to work with all parties, including other federal
agencies and industry, to assure that research is undertaken to
provide the necessary answers to the outstanding questions
about the safety of mobile phones.
What is known about cases of human cancer that have been
reported in users of hand-held mobile phones?
Some people who have used mobile phones have been diag-
nosed with brain cancer. But it is important to understand that
this type of cancer also occurs among people who have not
used mobile phones. In fact, brain cancer occurs in the U.S.
population at a rate of about 6 new cases per 100,000 people
each year. At that rate, assuming 80 million users of mobile
phones (a number increasing at a rate of about 1 million per
Reference
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