# Prostate-specific antigen

Prostate-specific antigen (PSA) is a protein made by the prostate that can be measured in a blood test.

Doctors use the PSA blood test to help screen for prostate cancer in men without symptoms. PSA can rise because of cancer, an enlarged prostate or inflammation, so a high result is usually confirmed and may lead to MRI or biopsy. Screening age and intervals depend on national guidelines and personal risk.

Also called: PSA.

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