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Researchers: Prostate Biopsy Not Always Necessary, May Lead To Other Health Ailments

Fri, 06 Nov 2009 14:22:0

Winston-Salem, NC (AHN) - Researchers at Wake Forest University School of Medicine and the University of Wisconsin-Madison have found that some elevated prostate-specific antigen (PSA) levels in men may be caused by a hormone normally occurring in the body. What the findings mean is the antigens are not necessarily a predictor of the need for a prostate biopsy, which can lead to numerous health ailments in males.

Medical professionals typically view the levels of PSA as a potential sign of prostate cancer, leading to the widespread use of PSA testing. However, University of Wisconsin researchers found that parathyroid hormone, a substance the body produces to regulate calcium in the blood, can elevate prostate-specific antigen (PSA) levels in healthy men who do not have prostate cancer.

These "non-cancer" elevations in PSA account for many men to be biopsied unnecessarily, which often leads to unnecessary treatment.

"PSA picks up any prostate activity, not just cancer," said lead investigator Gary G. Schwartz, Ph.D., M.P.H., an associate professor of cancer biology and epidemiology and prevention at the School of Medicine. "Inflammation and other factors can elevate PSA levels. If the levels are elevated, the man is usually sent for a biopsy. The problem is that, as men age, they often develop microscopic cancers in the prostate that are clinically insignificant. If it weren't for the biopsy, these clinically insignificant cancers, which would never develop into fatal prostate cancer, would never be seen."

As a result of the prevalence of PSA screening more men are being biopsied. Most men, when told that they have prostate cancer, elect treatment even though it may not be necessary. According to health officials in only one of six cases does a biopsy diagnosis of prostate cancer result in a cancer that would be fatal if untreated. High rates of prostate biopsy, therefore, lead to the over treatment of prostate cancer which lead to an increased rate of the side effects of treatment, including impotence and urinary incontinence.

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