Motorola V101 - Manual (Page 146)

F
D
A
Upd
a
te f
o
r Mobi
le Phones
142
considered together. It should be noted that the average length of mobile phone
exposure in this study was less than three years.
When 20 types of glioma were considered separately, however, an association was
found between mobile phone use and one rare type of glioma,
neuroepithelliomatous tumors. It is possible with multiple comparisons of the same
sample that this association occurred by chance. Moreover, the risk did not increase
with how often the mobile phone was used, or the length of the calls. In fact, the risk
actually decreased with cumulative hours of mobile phone use. Most cancer causing
agents increase risk with increased exposure. An ongoing study of brain cancers by
the National Cancer Institute is expected to bear on the accuracy and repeatability
of these results.(1)
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 24 hours of exposure. It is possible that exposing the test cells to
radiation for this long resulted in heating. Since this assay is known to be sensitive
to heating, heat alone could have caused the abnormalities to occur. The data
1039b80o.book Page 142 Monday, December 17, 2001 2:00 PM