Prostate-Specific Antigen (PSA) Volume Index (Total Volume-Derived PSA)

Your doctor may order this test to check the overall health of your prostate gland, screen for early signs of prostate cancer before symptoms appear, or monitor a prostate condition you already have and see how well treatment is working over time.

Doctors may order this test if you have symptoms like frequent urination, difficulty urinating, or if you’re at higher risk for prostate issues. It can also be part of routine screening for men over a certain age or those with a family history of prostate cancer.

Before your test, tell your doctor about all medications, supplements, and any recent procedures you have had, since some of these can affect your results. You may be asked to avoid vigorous activity, such as cycling, for about 48 hours beforehand. Fasting is usually not required, but always follow the specific instructions your care team gives you.

No special preparation is needed. You’ll likely have a simple blood draw, similar to other routine blood tests. Avoiding strenuous activity or ejaculation for 2–3 days before the test may help ensure accurate results.

Results are typically reported in nanograms per milliliter (ng/mL). Higher levels can point to prostate enlargement, inflammation, infection, or cancer, but an elevated number does not automatically mean cancer is present. Your doctor will interpret your result together with your age, symptoms, and medical history, and may recommend repeat testing, imaging, or a biopsy if needed.

Results are interpreted based on your prostate volume and overall health. Higher-than-expected levels may signal potential issues, but they don’t confirm a diagnosis alone. Follow-up tests or evaluations may be needed.

An elevated result can be caused by a benign enlarged prostate (benign prostatic hyperplasia), prostatitis, a urinary tract infection, recent sexual activity, vigorous exercise such as cycling, or a recent prostate biopsy or urinary catheter placement. Certain medications, including some drugs used for hair loss, can also lower PSA levels and influence your result.

Elevated PSA volume index can be caused by prostate enlargement, inflammation, infection, or cancer. Lower-than-expected levels might suggest prostate shrinkage or certain medical conditions.