Washington: A new screening method combining a novel drug therapy and changes in prostate specific antigen (PSA) levels can detect an aggressive prostate cancer, despite negative results obtained by biopsies, according to a US study.Produced by the prostate gland, PSA, found in blood and semen, can be detected by a blood test. Anything higher than four nanograms in a millilitre of blood can indicate prostate cancer.The new study by NewYork-Presbyterian Hospital/Weill Cornell Medical Centre, shows that PSA can be a much more effective marker for prostate cancer when an additional drug therapy is used, than it can as a stand-alone test, which is how it is currently used by physicians, the Journal of Urology reports.
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