study reports increased risk of acoustic neuroma with cell phone
This study was
part of the INTERPHONE study, an international case-control
study of brain tumours, acoustic
neuroma, and parotid gland tumours in relation to mobile phone
use. It was population-based, and included all persons age 20 to
69 years of 3 geographical areas covered by the Cancer Registries
in Stockholm, Göteborg, and Lund.
The study was carried out in 1999-2002. There were 148 cases and
604 controls. For regular use, regardless of duration, the relative
risk was estimated to be 1.0. For those with at least 10 years
(14 cases) since first regular use, the odds
ratio (OR) was 1.9. This figure, which suggests a near-doubling
of the risk for phone users, compared with non-users, was not quite
statistically significant. For those with 5-9 years since first
regular use, the OR was 1.1. For ipsilateral use (use of the phone
on the same side as the tumour occurred) those with at least 10
years since first regular use had an OR of 3.9 (an almost four-fold
increased risk). For 5-9 years the OR was 1.1.
findings do not indicate an increased risk of acoustic neuroma
related to short-term mobile phone use after a short latency period.
However, our data suggest an increased risk of acoustic neuroma
associated with mobile phone use of at least 10 years duration".
is a rare benign tumour of the auditory nerve, and causes dizziness,
hearing loss, and tinnitus (a ringing in the ears). It affects between
1 - 20 people per million population per year. There have been a
number of other studies that have examined the relationship between
this tumour and the use of cell phones. Most have had very few cases
with long-term use of cell phones. More results are expected from
the INTERPHONE study within the next year or two. For more, see
"Research - Epidemiology".
Lonn S, Ahlbom A, Hall P, Feychting M. Mobile phone use and the
acoustic neuroma. Epidemiology 2004;15:653-659.
No association between cell phone use and salivary
associates have published a series of papers on studies that examined
a possible association between cell phones and brain tumours (for
more, see "What's New", November
'99, June '00, April
and July '01, August
and November '02, and April
'03). They have now studied cell phone use and salivary gland
tumours, and have found no association. They obtained information
on 267 cases reported to Swedish cancer registries between 1994
and 2000, and compared them to 1053 controls. The authors caution
that their study does not permit conclusions about long term heavy
use of cell phones. For more, see "Research
Hardell L, Hallquist A, Mild KH, Carlberg M, et al. (2004): No association
between the use of cellular or cordless telephones and salivary
gland tumours. Occup Environ Med 61:675-679.
Transactions publish papers on RF radiation
A recent edition of IEEE Transactions on Microwave Theory and Techniques
published a number of papers dealing with research techniques used
in the investigation of the effects of radiofrequency radiation.
Amongst the topics discussed were dosimetry, exposure systems, and
SAR measurement. Some of the papers are referenced below.
Gandhi OP, Kang G (2004): Inaccuracies of a plastic "pinna"
SAM for SAR testing of cellular telephones against IEEE and ICNIRP
safety guidelines. IEEE Transactions on Microwave Theory and Techniques
NS, Jerome JW, Pierce LC, Taflove A (2004): Computational modeling
evidence of a nonthermal electromagnetic interaction mechanism with
living cells: Microwave nonlinearity in the cellular sodium ion
channel. IEEE Transactions on Microwave Theory and Techniques 52:2040-2045.
J, Samaras T, Oesch W, Spat D, et al. (2004): High peak SAR exposure
unit with tight exposure and environmental control for in vitro
experiments at 1800 MHz. IEEE Transactions on Microwave Theory and
J, Spat D, Samaras T, Oesch W, et al. (2004): In vitro exposure
systems for RF exposures at 900 MHz. IEEE Transactions on Microwave
Theory and Techniques 52:2067-2075
P, Dale C, Veyret B, Wiart J (2004): Dosimetric analysis of a 900
MHz rat head exposure system. IEEE Transactions on Microwave Theory
and Techniques 52:2076-2083.
to replicate EMF effect on short term memory
of this study reported previously that electromagnetic fields (EMFs)
emitted by a mobile phone facilitate short term memory functioning
(Koivisto, 2002b). In the present study they attempted to replicate
their earlier findings. However, there were some modifications:
the short term memory test was slightly modified, the phone battery
was quieter, the phone was attached to the head more comfortably,
exposure conditions were separated by 24 hours, and additional tests
of cognitive function
were included. Improvements in the methodology were that the testing
was performed in two independent laboratories (in Sweden and Finland)
and was of a double blind design.
In this study
the EMFs (from a 902 MHz phone) had no effect on the subjects' reaction
times or the accuracy of their responses, compared with sham exposure.
For more, see
"Research - Clinical Experiments
- Cognitive function".
Haarala C, Ek M, Bjornberg L, Laine M, et al. (2004): 902 MHz mobile
phone does not affect short term memory in humans. Bioelectromagnetics