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Marijuana May Reduce Risk of Certain Cancers, Study Says
August 27, 2009

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Research Summary

A new study finds that long-term marijuana users have a lower risk of certain head and neck cancers, Reuters reported Aug. 25.

Researchers from Brown University studied patients with head and neck squamous-cell carcinoma (HNSCC) and a control group and found that subjects who had smoked marijuana for 10 to 20 years had a 62-percent reduced risk of getting HNSCC. Those who smoked marijuana 0.5 to 1.5 times per week had a 48-percent reduction in risk.

The study authors, led by Karl T. Kelsey, said that the findings may be linked to the known antitumor action of cannabinoids. However, they cautioned that larger studies are needed to confirm the findings and that the risks of marijuana use may outweigh any health benefits.

The study was published in the August 2009 issue of the journal Cancer Prevention Research.

This article summarizes an external report or press release on research published in a scientific journal. When available, links to the sources are provided above.

COMMENTS ON THIS ARTICLE:

Posted by Chet Phillipe on 28 Aug 09 02:29 PM EDT
Dr. Forrest Tennant, former Rams (NFL) Medical Director & Army Medical Officer vet, states MJ also causes cancer in the throat, larnyx, lungs, ect. Also taught in drug lectures, MJ is 14 times worse that cigarettes. How can MJ be as affective as stated? MJ also is fat soluable and soaks fully into the white corpusles, or the immunce system.

Posted by Dwayne on 28 Aug 09 03:13 PM EDT
Chet show me the proof !!! where are all the dead people?? Prove to me that it causes cancer.When I smoked cigarettes and I smoked for 35 yrs I would cough up black Flem from a sound sleep.Now that I have been cigarette free for four yrs it has all stopped.Now mind you I smoked weed just as long and still do and now I run 3 miles every morning before work.Tell me again how bad it is.

Posted by SensibleCitizen on 28 Aug 09 08:39 PM EDT
Marijuana has been used for thousand of years as medicine. The human body has cannabanoid receptors designed for marijuana use. Dr. Tennant is a prohibitionist and of course, would be against marijuana. http://sportsillustrated.cnn.com/vault/article/magazine/MAG1068572/index.htm We must find people who will talk about this subject without the false statements of the US govt prohibtion machine.

Posted by Bernie Ellis on 30 Aug 09 08:27 AM EDT
It is heartening to see that this large case-control study is receiving some much deserved media attention. In addition to the Brown University researchers, co-authors for this study are from Boston University, Louisiana State University and the University of Minnesota. Its conclusions mirror those of Tashkin et al, another large study that showed no cancer or COPD risk from cannabis use, a finding that Tashkin (a long-time drug worrier) did not expect. Research (primarily conducted outside our country because of the absurd restrictions against cannabis research here) indicates that cannabis may help fight several more types of cancer (lung, breast, prostate, pancreatic, glioma cell (brain), and skin cancer, as well as leukemia). Thus, the head/neck cancer finding of the Brown study should not be a surprise. Of course, none of this would be a surprise if our government had not aggressively surpressed research conducted 35 years ago at the Medical College of Virginia that came to the same conclusions. It seems that the First Amendment is routinely damned when the issue is propping up our failed war on (some) drugs. For a well-documented review of what we have known about the anti-cancer properties of cannabis and how long we've known it, visit this link: http://www.huffingtonpost.com/paul-armentano/what-your-government-know_b_108712.html

Posted by senseless on 30 Aug 09 11:19 AM EDT
Who actually believes marijuana is as dangerous as tobacco, let alone 14 times that dangerous? So some doctors advocate prevention, and misinformation is used in lectures about drugs. So what? This article isn't just unverified claims like your post.

Posted by A. Barger on 01 Sep 09 01:13 PM EDT
There is certainly evidence that marijuana may be anti-tumor in lungs and, now in this research, head and neck cancers. These are areas where marijuana smoke goes and it may contain cannabidiol, another cannabinoid substance in marijuana. It seems from research that it is the cannbidiol that offsets the carcinogens that do exist in marijuana smoke. However, there is also research showing that men who are long term marijuana users may double their risk for testicular cancer, so the issue is not black or white.

Posted by lauren carter on 09 Sep 09 03:51 PM EDT
I am on the front lines of the alcohol and drug treatment community and have been treating addicts for 27 years. If dying people want to use cannabis to ease their suffering , I have no problem with that. What I have a problem with is longterm marijuana addicts persisting in the fantasy it is harmless. I sure don't want to be on the road with them, and I have seen way too many teens who have lost their desire to achieve something good in life because pot has gotten in their way, sapped their ambition, and made many slow and incoherent. If it were legalized and priced at, say $1800 an oz, with $1350 of it going to treatment offered to addicts, then that mightslow the use down amongst teenagers.

Posted by Brinna Nanda on 25 Nov 09 11:24 PM EST
The only thing that will slow cannabis use among teens is to regulate the distribution. This means checking for ID, and taking sales out of the hands of criminals and the juveniles they enlist to carry out their illegal activities. Regulation IS law and order. Prohibition is a free-for-all.

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