Navigation Links
New finding suggests prostate biopsy is not always necessary
Date:11/6/2009

WINSTON-SALEM, N.C. Researchers at Wake Forest University School of Medicine and the University of Wisconsin-Madison have discovered that some elevated prostate-specific antigen (PSA) levels in men may be caused by a hormone normally occurring in the body, and are not necessarily a predictor of the need for a prostate biopsy.

Elevated levels of PSA have traditionally been seen as a potential sign of prostate cancer, leading to the widespread use of PSA testing. However, the 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 could cause 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."

However, because PSA screening has become so common, more men are being biopsied, Schwartz said. Most men, when told that they have prostate cancer, elect treatment even though it may not be necessary. In reality, Schwartz said, 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, he said, leading to an increased rate of the side effects of treatment, including impotence and urinary incontinence.

The study, coauthored by Halcyon G. Skinner, Ph.D., M.P.H., of the University of Wisconsin-Madison, appears in the current issue of Cancer Epidemiology, Biomarkers & Prevention.

For the study, the researchers analyzed data from 1,273 men who participated in the National Health and Nutrition Examination Survey 2005-2006, and who did not report any current infection or inflammation of the prostate gland, prostate biopsy in the past month, or history of prostate cancer at the time of the survey.

After adjusting for age, race and obesity because PSA levels increase with age, are higher in black men, and are lower in overweight men the researchers found that the higher the level of parathyroid hormone in the blood, the higher the PSA level. In men whose parathyroid level was at the high end of normal, the PSA level was increased by 43 percent putting many in the range for the urologist to recommend a biopsy.

The finding is especially significant for black men, added Skinner. About 20 percent of black men have elevated parathyroid hormone levels, compared with about 10 percent of white men which means blacks have a greater chance of being recommended for biopsy and over treated, he said.

This finding "could help scientists refine the prostate cancer screening test to better differentiate between those men who need to be biopsied and those who might be spared the procedure," Schwartz said. "It's likely that there are a lot of men out there with elevated PSAs that may be due to elevated parathyroid hormone rather than prostate cancer."

Parathyroid hormone is made by cells of the parathyroid glands, four small glands embedded in the thyroid. Although parathyroid hormone primarily controls calcium levels in the blood, recent research has shown that parathyroid hormone can promote prostate cancer cell growth. The research by Schwartz and Skinner is the first to suggest that parathyroid hormone also promotes prostate cell growth in men without prostate cancer.


'/>"/>

Contact: Jessica Guenzel
jguenzel@wfubmc.edu
336-716-3487
Wake Forest University Baptist Medical Center
Source:Eurekalert

Related medicine news :

1. Research Findings Key for Understanding, Interpreting Genetic Testing for Long QT Syndrome
2. Finding Ways for Disabled People to Participate in Research is Goal of Case Western Reserve University Nursing School Study
3. Contour Products Promotes Survey for National Respiratory Care Week, Findings Prove Benefits of Contour CPAP Pillow for Sleep Apnea Patients
4. Study finds delay in follow-up among African-American women receiving abnormal breast finding
5. New findings on the formation of body pigment
6. Findings about veracity of peripheral vision could lead to better robotic eyes
7. Interleukin Genetics to Present Research Findings at Upcoming Medical Meetings
8. New findings about brain proteins suggest possible way to fight Alzheimers
9. Corn Refiners Association Comments on Findings in Recent Report on Sugars and High Blood Pressure
10. World Heart Day resonates with recent experts findings on CVD and EU institutions determination to promote heart health
11. Louisiana's TCA Cellular Therapy's Findings Reported at World Stem Cell Summit -- Patients' Legs Saved from Amputation Using Adult Stem Cells
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/21/2017)... ... July 21, 2017 , ... Sharon Kleyne ... signature product of her research center at Bio-Logic Aqua Research® Water Life Science®, ... the greatest number of sufferers of blindness. “We think that Nature’s Tears® EyeMist® ...
(Date:7/21/2017)... TORONTO, ONTARIO, CANADA (PRWEB) , ... July 21, ... ... may give insight into why concussion rates are on the rise, say researchers ... Annual Meeting today in Toronto, Ontario, Canada. , “The combination of evaluating the ...
(Date:7/20/2017)... ... July 20, 2017 , ... ... enterprise-grade IT operations analytics and application performance monitoring (APM) solutions, has expanded ... healthcare services providers. , According to Peter Ohrenberger, sales director at Nastel, ...
(Date:7/20/2017)... ... July 20, 2017 , ... Team Type 1 Foundation, a ... for everyone affected by diabetes, is teaming up with a Microsoft Corp. employee-led hackathon ... off on July 24th. , “Team Type 1’s mission overlaps seamlessly with Microsoft’s ...
(Date:7/20/2017)... ... July 20, 2017 , ... Using CDRH’s Medical Device ... — 1:30 p.m. – 3:00 p.m. ET, http://www.fdanews.com/mdqualitydata          , Device makers ... It’s known as the “CY2016 Annual FDA Medical Device Quality System Data” report. ...
Breaking Medicine News(10 mins):
(Date:7/6/2017)... division of Diplomat Specialty Infusion Group, is celebrating a decade of empowering ... celebrate its anniversary, ThriveRx recently launched a redesigned website at thriverx.diplomat.is ... to create the best user experience for consumers and health care professionals. ... Diplomat Pharmacy ... "We,ve made several great strides throughout the past 10 years," ...
(Date:7/5/2017)... Oramed Pharmaceuticals Inc. (NASDAQ: ... a clinical-stage pharmaceutical company focused on the development of oral ... from the Israel Securities Authority to dual-list its common stock ... will commence trading on the TASE on July 12, 2017 ... of the Company, it is expected that Oramed will be ...
(Date:7/5/2017)... Wash. , July 5, 2017   BioLife ... leading developer, manufacturer and marketer of proprietary clinical grade ... cryopreservation freeze media ("BioLife"), today announced that it ... its debt holder and largest shareholder, to modify its ... Pursuant to the modification, WAVI agreed to exchange ...
Breaking Medicine Technology: