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Edition: U.S. Article Comments (1) Technology Apple pays user compensation over iPhone tracking Amazon plans new Android tablet for this fall Netflix price hike draws user ire, investor glee Twitter gears up auto-ads for big clients: sources No link seen between cellphones, brain tumor Royalty payments dog Pandora co-founder Apple's chief patent lawyer leaving: sources Alibaba.com in deal with Western Union for AliExpress SAP attacks $1.3 billion Oracle verdict at hearing Sony: Our tablets are coming . . . eventually Follow Reuters Facebook Twitter RSS YouTube Read Obama walks out of tense US debt meeting - aide 13 Jul 2011 Los Angeles braces for weekend of "Carmageddon" 9:59am EDT U.S. to face Japan in women's World Cup final 8:52am EDT Mila Kunis Breaks Date With Marine? 13 Jul 2011 Dollar in full retreat, NZD storms 30-year peak | 13 Jul 2011 Discussed 119 Obama, lawmakers meet for 75 minutes on debt impasse 98 WRAPUP 1-Taxes still a stumbling block in U.S. debt talks 98 Obama and lawmakers regroup to seek debt deal Watched Circus magic transforms sand Wed, Jul 13 2011 Hefner's revenge; Ryan Reynolds stops traffic Fri, Jun 17 2011 A Tokyo-Paris flight in under three hours on the horizon Fri, Jun 24 2011 No link seen between cellphones, brain tumor Tweet Share this Email Print Related News New cancers in the family may merit extra screening Wed, Jul 13 2011 UPDATE 4-Trial size may limit use of Seattle Genetics drug Tue, Jul 12 2011 American men with cancer more likely to die than women Tue, Jul 12 2011 Evidence "increasingly against" phone cancer risk Mon, Jul 4 2011 Pfizer's quit smoking drug raises heart risks: study Mon, Jul 4 2011 Analysis & Opinion Financial engineering as a career: Part 1 Tech wrap: Facebook zooms into video age Related Topics Health » Technology » A man speaks on his mobile phone while standing on a boat on the River Thames with Canary Wharf and the financial district of London seen in the background. Credit: Reuters/Toby Melville By Amy Norton NEW YORK | Thu Jul 14, 2011 5:33am EDT NEW YORK (Reuters Health) - People who have used a cellphone for more than a decade do not appear to be at increased risk of a type of non-cancerous brain tumor, a large study suggests. Looking at data on more than 2.8 million Danish adults, researchers found that those who'd used a cellphone for 11 to 15 years were no more likely than newer users or non-users to develop an acoustic neuroma. Acoustic neuromas, also known as vestibular schwannomas, are non-cancerous, slow-growing tumors that form on the main nerve running from the inner ear to the brain. They can cause symptoms like ringing in the ears, dizziness and balance problems; in a small number of cases, they can grow large enough to press against the brain and become life-threatening. Although they are not cancerous, acoustic neuromas are considered important in the ongoing question of whether cellphones carry any brain cancer risk. "Of interest is that acoustic neuromas grow in the area of the brain where greater energy emitted from the cellphones is absorbed, compared to other areas of the brain," explained Dr. Joachim Schuz, who is with the World Health Organization's International Agency for Research on Cancer (IARC) and led the new study. So it might be expected that if cellphones were a cause of brain tumors, people who've used them for a long time might have an increased risk of acoustic neuroma -- especially on the side where they typically hold their phone. But that wasn't the case, Schuz's team reports in the American Journal of Epidemiology. Among the nearly three million Danish adults they had data for, just over 800 were diagnosed with acoustic neuroma between 1998 and 2006. And those who'd used cellphones the longest -- at least 11 years -- had no greater risk than shorter-term users or non-users. On top of that, Schuz said in an email, there was no indication that long-term cell users had larger-than-expected tumors. Nor did they have a tendency to develop acoustic neuromas on the right side, where most held their phone. Still, the findings are not the final word on cellphones and acoustic neuroma. One problem, according to Schuz, is that even long-term cellphone users had not been using their devices all that long. Acoustic neuromas generally grow slowly, and years may pass between a person's first symptoms and a diagnosis, Schuz noted. "As most cellphone users started their use only from the early 1990s onwards," he said, "we have only up to 15 years of observation time of larger numbers of users -- which is perhaps too short to see an effect, if there is any." There are also other types of brain tumors. Most studies on cellphones and brain cancer have failed to find an association, but some research has suggested there might be one. A large international study last year found that the heaviest cellphone users -- averaging 30 minutes a day for 10 years -- might have an increased risk of glioma, a cancerous form of brain tumor. And in May, the IARC released a report that classified the radiofrequency waves emitted from cellphones as "possibly carcinogenic" to humans -- based on what it called "limited evidence" of a link to glioma and acoustic neuroma. The current study was considered in the IARC's review, Schuz said. The problem with all of these studies is that they can only show -- or fail to show -- a correlation between cellphone use and brain tumors. They do not prove cause and effect. And many researchers believe that the radiofrequency waves from cellphones are not capable of causing tumors. However, since cellphones are now ubiquitous -- there are nearly 5 billion subscribers worldwide, according to the IARC -- experts generally agree that ongoing studies of any health risks from heavy, long-term use are needed. And with "virtually everyone" being a cell user today, Schuz said, those studies will have to compare heavy daily users with less-intense users. He noted, though, that even though people are spending more and more time on their phones, the devices' "average output power" appears to have gone down over time. SOURCE: bit.ly/o3zq3o American Journal of Epidemiology, online June 28, 2011. Health Technology Tweet this Link this Share this Digg this Email Reprints We welcome comments that advance the story through relevant opinion, anecdotes, links and data. If you see a comment that you believe is irrelevant or inappropriate, you can flag it to our editors by using the report abuse links. Views expressed in the comments do not represent those of Reuters. For more information on our comment policy, see http://blogs.reuters.com/fulldisclosure/2010/09/27/toward-a-more-thoughtful-conversation-on-stories/ Comments (1) solon wrote: I suggest that your header is spurious. Really, it should read “no correlation found between cellphone use and non-cancerous brain tumors.” Possibly ” no link seen between Reuters news reporting , obfuscation” is more representative of your new style of reporting. Jul 14, 2011 11:05am EDT -- Report as abuse See All Comments » Add Your Comment Social Stream (What's this?) © Copyright 2011 Thomson Reuters Editorial Editions: Africa Arabic Argentina Brazil Canada China France Germany India Italy Japan Latin America Mexico Russia Spain United Kingdom United States Reuters Contact Us Advertise With Us Help Journalism Handbook Archive Site Index Video Index Reader Feedback Mobile Newsletters RSS Podcasts Widgets Your View Analyst Research Thomson Reuters Copyright Disclaimer Privacy Professional Products Professional Products Support Financial Products About Thomson Reuters Careers Online Products Acquisitions Monthly Buyouts Venture Capital Journal International Financing Review Project Finance International PEhub.com PE Week FindLaw Super Lawyers Attorney Rating Service Reuters on Facebook Thomson Reuters is the world's largest international multimedia news agency, providing investing news, world news, business news, technology news, headline news, small business news, news alerts, personal finance, stock market, and mutual funds information available on Reuters.com, video, mobile, and interactive television platforms. Thomson Reuters journalists are subject to an Editorial Handbook which requires fair presentation and disclosure of relevant interests. NYSE and AMEX quotes delayed by at least 20 minutes. Nasdaq delayed by at least 15 minutes. For a complete list of exchanges and delays, please click here.

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