The cell phone contains a small transmitter that emits radiation near the head. This has caused great concern among the population, since it was not known whether this radiation could cause brain cancer or other organs of the central nervous system. In fact, studies are done with reference to this issue since 1994.

That study included 800 patients with this tumor from institutions in the U.S. cities of Phoenix, Boston and Pittsburgh and 800 control cases. Data collection consisted of a personalized comprehensive survey, with very specific questions about the start date of cell phone use, how long you used it, last date and level of use. There was no information about the appliance model. The completed data collected in 1998.

The researchers found no evidence that a person’s risk of developing a brain tumor increased with the number of years to minutes average daily usage of mobile phone. Neither brain tumors tended to occur more often than expected from the side of the head in that reported using the phone.

Among those most used, the average was approximately 15 minutes per day or more for at least three years. Very few people used this type of equipment frequently for more than five years.

Peter Inskip, Sc.D., who was the principal investigator, said they found no evidence that cell phone use caused brain tumors, however, clarified, whether the increased risk occurred after more than five years old or people high intensity of use, this study probably did not detect.

The research was conducted between 1994 and 1998 in which they were most commonly used analog phones. Currently dominated by digital, operating at a higher frequency. However, there is no evidence so far that the risk of cancer differs between these two types of cell.

Similar results were found in two other studies, one published in December 2000 in the Journal of the American Medical Association by Muscat et al, which included 469 cases of brain cancer and 422 controls and another study conducted in Sweden by Hardell et al which included 233 cases and 466 controls. Neither of these two investigations found no association. Only reported a relationship between the side of the head that was used to talk on the phone and location of the tumor, but this association was based on very few cases.

Today, there are also three types of wireless or mobile phones used: cell phones for cars, portable phones and cordless phones. All these involve less exposure to radiation of the brain as the unit that issues it is at some distance from the person.

If very small cell phones that are carried in the hand no higher risk of brain tumor, would be very surprising that these other types of phones do it cause as exposed to a much lower frequency radiation.

The number of mobile phone users has increased tremendously in the last 10 years and trends continue. Because of this, a lot of scientific research studying the relationship between cell phone use and brain tumor, are currently undertaking.

The largest is a multicenter international including 3000 cases and 3000 controls, coordinated by the International Agency for Research on Cancer (IARC), headquartered in Lyon, France. Still remain several years to obtain results.

Moreover, it is expected that the results of another study in Denmark that includes 550,000 mobile phone users from 1982 to 1995, to be published. Currently in the U.S. and UK, are providing funds and efforts to continue the development of research on this topic.

The causes of brain cancer are unknown, therefore, scientists from the National Cancer Institute USA, evaluated a wide range of possible risk factors which include environmental, related to lifestyle and genetics. These include occupational exposure to chemicals and electromagnetic fields, dietary factors, family history of tumors, genetic factors, home use of some artifacts, reproductive history and hormonal exposures, viruses, and both medical and dental exposure to ionizing radiation.

The results of these reports will appear in future publications and due to the interest of the population, the use of cell phones will be the first.

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Mobile phones can be considered potentially dangerous in a few ways. First, is a device that sends and receives both high frequency radio waves. Second, these devices have batteries in them may be unstable or extreme heat in certain circumstances where a battery or other part is defective. Note that these cases are extremely rare.

The jury is still out on whether mobile phones or are not really hazardous to our health. While short-term risks are very low or nonexistent, the fact that mobile phones have been used by millions of people in the past decade, the duration and moderate long term risks are still unfounded.

Arguments supporting the belief that mobile phones are dangerous
1. Although evidence is still not clear, it is possible that using a mobile phone on a regular basis may increase the susceptibility to brain tumors or brain cancer by 2.5 times.
2. Mobile phones operate using magnetic fields. Studies based on research in the past have shown that in certain circumstances, magnetic fields can affect living cells.
3. Those who spend long periods of time talking on a mobile phone mentioned fatigue, loss of concentration and sometimes headaches.
4. It is possible that the radio waves that are emitted by mobile phones and the heat can damage tissue.

Arguments supporting the belief that mobile phones are safe
1. Radio waves emitted when a mobile phone is used not hot enough to affect or damage nearby tissues.
2. As incidence of brain tumor, researchers admit that the evidence is still unclear if tumors or cancer are directly related to mobile phone use.
3. Factors related to loss of concentration, fatigue or headaches are probably false, since they can not reproduce in the laboratory
4. The magnetic fields emitted by mobile phones are very small and can not affect living cells in ways harmful.

Some advice on mobile phone safety
If you feel threatened by potential health aspects of using a mobile phone, the easiest way to avoid this threat is simply not using these phones. Despite being highly desirable, our society is living comfortably, without moving in the past. If you would like the convenience of a mobile phone but also want to reduce your risk, there are some simple things you can do.

* Use a headset for the mobile phone away from your head
* Speak only for short periods of time on a mobile phone

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