Roma, 1 settembre 2005

Egr. sig. Angelo Zanotti,

le allego il comunicato stampa dello IARC (WHO) del 27 giugno 2001
tratto dalla pagina web:

http://www.iarc.fr/ENG/Press_Releases/archives/pr136a.html

Alla fine della pagina può trovare i riferimenti telematici e i contatti tramite i quali approfondire la ricerca e reperire dati.

Cordiali saluti.

Coordinamento dei Comitati di Roma Nord.
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International Agency for Research on Cancer

PRESS RELEASE N° 136

WHO 27 June 2001

IARC FINDS LIMITED EVIDENCE THAT RESIDENTIAL MAGNETIC FIELDS
INCREASE RISK OF CHILDHOOD LEUKAEMIA

An expert scientific working group of the Monographs Programme of the
International Agency for Research on Cancer (IARC) has concluded its
review of health effects of static and extremely low frequency (ELF)
electric and magnetic fields. Such fields include the earth's
magnetic field, and also originate from electrical power transmission
lines, electrical wiring in buildings, and electric appliances.
Magnetic fields are measured in units of microTesla; the earth's
static magnetic field, to which everyone is exposed, varies from 25
microTesla at the equator to 65 microTesla at the poles. Most
research on health effects has been done on ELF magnetic fields with
frequencies of 50 or 60 Hz.

Reports were first published in 1979 that childhood cancer might be
associated with exposures to residential ELF fields. Numerous studies
in many countries have been undertaken since then of possible
increased cancer risks in children and adults from ELF magnetic field
exposures. Special attention has focussed on leukaemia and on brain
tumours, which early reports had suggested might be increased. IARC
has now concluded that ELF magnetic fields are possibly carcinogenic
to humans, based on consistent statistical associations of high level
residential magnetic fields with a doubling of risk of childhood
leukaemia. Children who are exposed to residential ELF magnetic
fields less than 0.4 microTesla have no increased risk for leukaemia.
Because of insufficient data, static magnetic fields and static and
extremely low frequency electric fields could not be classified as to
carcinogenic risk to humans.

However, pooled analyses of data from a number of well-conducted
studies show a fairly consistent statistical association between a
doubling of risk of childhood leukaemia and power-frequency (50 or 60
Hz) residential ELF magnetic field strengths above 0.4 microTesla. In
contrast, no consistent evidence was found that childhood exposures
to ELF electric or magnetic fields are associated with brain tumours
or any other kinds of solid tumours. No consistent evidence was found
that residential or occupational exposures of adults to ELF magnetic
fields increase risk for any kind of cancer.

Studies in experimental animals have not shown a consistent
carcinogenic or co-carcinogenic effects of exposures to ELF magnetic
fields, and no scientific explanation has been established for the
observed association of increased childhood leukaemia risk with
increasing residential ELF magnetic field exposure.

Health effects of radiofrequency electromagnetic fields, which are
produced by such sources as radio and television transmission towers,
portable telephones, and radar, were not evaluated by the IARC
working group. These exposures will be reviewed by the IARC
Monographs Programme when research that is currently in progress has
been published, most likely in 2005.


For further details of the Monographs evaluation, consult
http://monographs.iarc.fr, under "Agents most recently evaluated," or
inquire by e-mail to cie@iarc.fr

For further details of current research at IARC on electric and
magnetic fields, inquire by e-mail to cardis@iarc.fr

For more general information, please contact Dr Nicolas Gaudin,
Chief, IARC Communications ( com@iarc.fr )
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World Health Organization
International Agency for Research on Cancer

Organisation mondiale de la Santé
Centre international de Recherche sur le Cancer


150, cours Albert-Thomas 69372 Lyon Cedex 08 (France)
Telephone: 33 472 738 485 Facsimile: 33 472 738 311
http://www.iarc.fr

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