What Is PSA Explained

PSA stands for Prostate-Specific Antigen.

PSA is a protein produced by the prostate gland. Small amounts normally enter the bloodstream and can be measured with a blood test.

Doctors often use the PSA test to help detect or monitor Prostate Cancer.

A higher PSA level may signal:

• prostate cancer
• an enlarged prostate
• inflammation of the prostate
• infection of the prostate

The PSA test does not diagnose cancer by itself, but it helps doctors decide if more testing is needed.

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What Is the PSA Test

The PSA test is a simple blood test.

A small blood sample is taken and the PSA level is measured in nanograms per milliliter (ng/mL).

Doctors use PSA testing to:

• screen for possible prostate cancer
• monitor prostate cancer after treatment
• watch for recurrence
• evaluate prostate health

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What Is a Normal PSA Level

PSA levels vary by age and individual health.

Typical PSA ranges may include:

• Under 4 ng/mL – often considered normal
• 4–10 ng/mL – borderline range
• Above 10 ng/mL – higher concern for cancer

However, PSA levels must always be interpreted carefully.

Some men with low PSA still have cancer, while others with higher PSA do not.

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Why PSA Levels Can Rise

PSA levels can increase for many reasons.

Common causes include:

Prostate Cancer

Cancer cells may produce more PSA.

This is why PSA testing can help detect cancer early.

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Benign Prostatic Hyperplasia (BPH)

BPH is an enlarged prostate that commonly occurs with aging.

It can raise PSA levels even when cancer is not present.

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Prostatitis

Inflammation or infection of the prostate can cause PSA levels to rise temporarily.

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Medical Procedures

Certain procedures can increase PSA for a short time, including:

• prostate biopsy
• catheter use
• recent prostate examination

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What Happens if PSA Is High

A high PSA result does not automatically mean cancer.

Doctors may recommend:

• repeating the PSA test
• imaging scans
• a prostate MRI
• a prostate biopsy

A biopsy is the only way to confirm prostate cancer.

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PSA Testing and Cancer Screening

PSA screening can help detect prostate cancer earlier.

However, PSA screening is sometimes debated because:

• some cancers grow very slowly
• some PSA elevations are not cancer

Doctors often consider:

• age
• family history
• symptoms
• overall health

before recommending screening.

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PSA After Cancer Treatment

PSA is also used to monitor treatment success.

After treatment for prostate cancer:

• PSA should drop to very low levels
• rising PSA may signal recurrence

Learn more:
Cancer Recurrence Explained
https://helping4cancer.com/cancer-recurrence-explained/

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PSA and Active Surveillance

Some prostate cancers grow very slowly.

Doctors may recommend active surveillance, which includes:

• regular PSA testing
• imaging scans
• occasional biopsy

This approach avoids unnecessary treatment.

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Key Takeaways

PSA is a protein made by the prostate gland.

The PSA blood test helps doctors evaluate prostate health.

Higher PSA levels may indicate cancer, but other conditions can also raise PSA.

PSA testing is used for screening, diagnosis, and monitoring prostate cancer.

Results should always be interpreted with other medical information.

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External References

National Cancer Institute
https://www.cancer.gov/types/prostate/psa-fact-sheet

American Cancer Society
https://www.cancer.org/cancer/prostate-cancer.html

U.S. Preventive Services Task Force
https://www.uspreventiveservicestaskforce.org/