Men with narrow shoulders and some men who start going bald early may be at higher risk of prostate cancer, U.S. researchers said Monday.
Wendy Demark-Wahnefried and colleagues at Duke University in North Carolina said they had found links between testosterone levels and prostate risk, although they had not been able to conclusively link baldness and shoulder width with the disease.
Baldness has long been linked with high testosterone levels, and Ms. Demark-Wahnefried's group was trying to find a link among baldness, testosterone levels in youth and prostate cancer.
Writing in the Journal of Andrology, researchers said they found a link between high testosterone levels and vertex baldness -- the kind that causes a bald patch on the top of the head.
They studied more than 300 men, half who had prostate cancer, between ages 50 and 70. They found a nearly doubled increase in the risk of prostate cancer among men who had high levels of "free" testosterone -- the kind that cells can take up and use easily.
But they were not able to make the third link, showing baldness and prostate cancer were linked.