Prostate-Specific Antigen (PSA) in Serum/Plasma by Immunoassay (Screening Probe)

Why This Test Is Done

Doctors may order a PSA test to monitor symptoms of prostate issues, such as frequent urination, pain during urination, or blood in urine. It can also be used during routine check-ups for men over a certain age, depending on individual risk factors. Sometimes, PSA levels are checked after a prostate biopsy or treatment to see how the body is responding.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to avoid ejaculation for 2–4 days before the test. If you have a recent prostate procedure, your doctor may advise additional timing. Bring any medications you’re currently taking, as some can affect PSA levels.

What the Test Results Mean

PSA results alone don’t diagnose prostate cancer—they’re part of a broader evaluation. Elevated levels can signal inflammation, infection, or cancer, but other conditions (like an enlarged prostate) may also raise PSA. Your doctor will review results in the context of your symptoms and medical history.

Possible Results and Next Steps

If your PSA level is within a normal range for your age and health, no further action may be needed. If it’s higher than expected, follow-up tests (like a digital rectal exam or additional PSA subtypes) may be recommended to investigate further.