A new study shows there may be a link between baldness and prostate cancer. Men who are experiencing early signs of baldness, losing their hair, may be at an increased risk of dyring from prostate cancer.
Researchers from the National Cancer Institute presented their findings this week at the American Association for Cancer Research meeting in Philadelphia. They analyzed information from more than 4,000 U.S. men ages 25 to 74, who were assessed by a dermatologist and categorized has having no balding, or minimal, moderate or severe balding.
Men with any degree of balding were 56 percent more likely to die from prostate cancer over a 21-year period, compared to men showing no signs of hair loss. With these moderate balding men, were 83% more likely to die from prostate cancer.
The findings support the hypothesis that a shared biological process influences both balding and prostate cancer, the researchers said. One theory is that high levels of male hormones (such as testosterone) play a role in both conditions. Men with male pattern baldness have been found to have higher levels of male hormones, and these hormones also fuel the growth of prostate cancer cells.
More studies are needed around this correlation. "It is too soon to make any recommendations about screening men for prostate cancer based on the findings," said study author Cindy Zhou, a postdoctoral fellow at the National Cancer Institute. "We still need future studies to replicate what we observed," Zhou said.
If the findings are confirmed, male pattern baldness might be used as one indicator of a man's risk of developing prostate cancer, which could help scientists determine which men should undergo prostate cancer screening, the researchers said. However, studies would first need to show that taking a man's baldness into account actually improves researchers' ability to predict the man's prostate cancer risk, above and beyond what can be predicted using current risk factors, Zhou said.
Researchers noted, that earlier studies have found that men in their 20s were at a higher risk for prostate cancer then men who don't start to lose their hair until later in life. This new study found a link between balding and fatal prostate cancer regardless of age.
Interestingly, the new study did not find a link between severe balding and an increased risk of fatal prostate cancer. This could be because there were few men in the study with severe balding, which limited the ability of the study to detect a link, Zhou said.
The study was published in the Journal of Clinical Oncology.