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Predicting the return of prostate cancer: New Johns Hopkins study betters the odds of success
Date:7/2/2009

Cancer experts at Johns Hopkins say a study tracking 774 prostate cancer patients for a median of eight years has shown that a three-way combination of measurements has the best chance yet of predicting disease metastasis.

The new prediction method comprises the length of time it takes for PSA (prostate-specific antigen) to double, Gleason score (a numeric indicator of prostate cancer aggressiveness as seen under the microscope), and the interval between surgical removal of the prostate and the first detectable PSA level. According to Johns Hopkins investigators, combining these three measurements more accurately estimates risk that the cancer has spread than do other methods and should help determine which patients may benefit from additional therapy when PSA levels rise after surgery to remove the prostate.

Findings from the study presented at the June 2009 annual meeting of the American Society of Clinical Oncology (ASCO) may also help resolve the debate on when and in what form secondary treatments should occur.

"There is much debate on whether to prescribe immediate treatment for a man whose PSA begins to rise after he has had prostate cancer surgery, or to delay it," says Emmanuel Antonarakis, M.D., Johns Hopkins Kimmel Cancer Center investigator. "Studies suggest that most men live the same length of time overall whether they receive therapy at the first sign of a rising PSA or wait until the cancer has spread to other sites."

After reviewing the records of 774 men whose PSA rose after surgery to remove the prostate, the researchers found that Gleason score and two measurements for PSA were the strongest risk factors for prostate cancer metastasis. Men with Gleason scores in the highest range, between eight and 10, were twice as likely to develop metastatic cancer. In men whose PSA became detectable within three years after surgery, cancer was more than three times more likely to spread to other organs. Finally, m
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Contact: Amy Mone
amone1@jhmi.edu
410-955-1287
Johns Hopkins Medical Institutions
Source:Eurekalert

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