Prostate specific antigen (PSA) testing is a test used to identify the early stages of prostate cancer. PSA levels are detected using a simple blood test.
- PSA levels below 4 ng/mL are considered normal for men older than 40 years.
- PSA levels below 2.7 ng/mL are considered normal for men younger than 40 years.
- PSA levels above 4 ng/mL are considered to be elevated.
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