Swedish study reports increased risk of acoustic neuroma with cell phone use
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 authors conclude:
Acoustic neuroma 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 risk
Hardell and 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 - Epidemiology".
Hardell L, Hallquist A, Mild KH, Carlberg M, et al. (2004): No association
References: 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 52: 2004-2012.
Stoykov 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.
Schuderer 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 Techniques 52:2057-2066.
Schuderer 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
The authors 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".
Reference: Haarala C, Ek M, Bjornberg L, Laine M, et al. (2004): 902 MHz mobile phone does not affect short term memory in humans. Bioelectromagnetics 25:452-456.