what blood tests are done for prostate cancer
PSA blood test. The prostate-specific antigen (PSA) blood test is used mainly to try to find prostate cancer early in men without symptoms (see Prostate Cancer Prevention and Early Detection). But it is also one of the first tests done in men who have symptoms that might be caused by prostate cancer.Most healthy men have PSA levels under 4 nanograms per milliliter (ng/mL) of blood. The chance of having prostate cancer goes up as the PSA level goes up.ut it is also one of the first tests done in men who have symptoms that might be caused by prostate cancer. Most healthy men have PSA levels under 4 nanograms per milliliter (ng/mL) of blood. The chance of having prostate cancer goes up as the PSA level goes up.