Hormones
Prostate-Specific Antigen
A protein made by prostate tissue and measured in blood.
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About this biomarker
PSA is produced by prostate cells and can enter the bloodstream. It is used in prostate-related evaluation and monitoring.
Why it matters
It can reflect prostate activity, enlargement, inflammation, or other prostate-related changes.
What lower levels may suggest
Low PSA is generally less concerning and may be seen with smaller prostate volume or certain medications.
What higher levels may suggest
High PSA may be seen with prostate enlargement, inflammation, recent prostate manipulation, or prostate cancer.
Common tests
Total PSA, free PSA, prostate screening and monitoring panels
Related biomarkers
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