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Tag: risk assessment

September 2, 2026

Free PSA vs. Total PSA: Differences, Percent-Free PSA, and Next Steps

Learn what free, bound, total, and percent-free PSA measure—and why the result adds context but never makes the diagnosis alone.

Direct answer: Total PSA is the amount of prostate-specific antigen measured in blood in both protein-bound and unbound forms. Free PSA is the unbound fraction. Percent-free PSA is calculated from the free and total measurements […]

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