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Smokers at High Risk of Kidney Cancer
Smokers are 39 percent more likely to develop kidney cancer than nonsmokers, according to a review of 24 studies conducted over the past four decades, Reuters reported March 2.
Risk rose with total lifetime cigarette consumption, researchers added. Smoking has long been associated with lung and other types of cancers, but the link with kidney cancer has only been established recently.
"This study actually quantifies the risk, and we found that the risk is larger than we'd thought," said lead study author Dr. Jay D. Hunt of the Louisiana State University Health Sciences Center.
Hunt said that smokers' risk of getting kidney cancer is modest compared to their risk of developing lung cancer, but that even light or moderate smokers are at increased risk of the disease. Male smokers had a 50-percent higher risk of developing kidney cancer, while women's risk rose by 22 percent. Hunt said the gender disparity may be because smoking among women only rose strongly after World War II, which could have skewed some of the results in the studies that were reviewed.
Hunt added that the risk of kidney cancer seems to decline after a smoker quits.
The research was published in the March 10, 2005 issue of the International Journal of Cancer.
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