| http://www.w3.org/ns/prov#value | - Only a prostate biopsy can diagnose this cancer.Your doctor will look at your PSA result and consider your age, ethnicity, medicines you are taking, and other things to decide whether your PSA is normal and whether you need more tests.A normal PSA level is considered to be 4.0 ng/ml (nanograms per milliliter of blood).For men in their 50s or younger, a PSA level should usually be below 2.5.Older m
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