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Dense bones linked to raised risk for prostate cancer
Date:7/28/2010

Men who develop prostate cancer, especially the more aggressive and dangerous forms that spread throughout the body, tend to retain denser bones as they age than men who stay free of the disease, suggests new research from Johns Hopkins and the National Institute on Aging (NIA), part of the National Institutes of Health.

The finding, published in the July British Journal of Urology International, could help scientists gain a better grasp on what causes prostate cancer and its spread.

Researchers have long known that prostate cancers that spread, or metastasize, often migrate to bone. That idea led Stacy Loeb, M.D., a resident in the Department of Urology at the Johns Hopkins University School of Medicine, and her colleagues to wonder whether there is a connection between bone characteristics and prostate cancer development and metastasis.

"We reasoned there may be some difference between men who develop prostate cancer, especially metastatic disease, and those who don't, and it was logical to see if there was something different about their bones," says Loeb.

To investigate, she and her colleagues used data from the NIA's Baltimore Longitudinal Study of Aging , a long-term study that has tracked various health-related information for hundreds of Baltimore-area participants since 1958. The researchers collected data on the bone mineral density of 519 men, measured from 1973 to 1984. They then used the same collection of data to see which men were eventually diagnosed with prostate cancer.

Typically, bone density declines with age in both men and women. However, Loeb and her colleagues found that the 76 men in their study who went on to develop prostate cancer had bone density that remained significantly higher as they aged, compared with those who remained cancer free. The findings held up even after the researchers accounted for lifestyle factors that might influence bone density, such as smoking, body mass
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Contact: Christen Brownlee
cbrownlee@jhmi.edu
410-955-7832
Johns Hopkins Medical Institutions
Source:Eurekalert

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