PSA (Ultra Sensitive) Cancer of the prostate is the second most common cause of cancer deaths in men.after lung cancer. Not surprisingly, more and more men are having regular serum prostate-specific antigen (PSA) determinations, as part of an early detection program. Indeed.many prefer to rely on the PSA level alone.rather than have the more intrusive digital rectal exam. There's no doubt that the use of PSA testing has resulted in an increase in the number of men having prostate biopsies and subsequently being diagnosed with cancer.with a shift towards detection at earlier stages. PSA blood serum is a non invasive blood test. Protect yourself with Preventive testing! Early detection of elevated prostate specific antigen levels can be helpful in possoble cure of prostate cancer.