Prostate-Specific Antigen (PSA) in Serum by Immunoassay (Qualitative Probe)

What This Test Measures

PSA (prostate-specific antigen) is a protein made mostly by healthy prostate cells. While it’s found in small amounts in other tissues, high levels can signal possible prostate problems, such as inflammation, infection, or cancer. This test detects PSA using a specialized probe to determine its presence in your blood.

How the Test Works

Your blood sample is analyzed using a sensitive immunoassay (a lab test that detects specific proteins) with a probe to identify PSA. The result is reported as either positive (PSA present) or negative (PSA not detected), rather than a numerical value.

Why It’s Done

A qualitative PSA test may be used as part of a screening or diagnostic process, particularly when further evaluation is needed for symptoms like urinary changes, pain, or concerns about prostate health. It’s not typically used alone for routine check-ups.

Common Reasons for Testing

This test might be ordered if you have symptoms like difficulty urinating, pain in the pelvic area, or if you’re at higher risk for prostate issues due to age, family history, or other medical conditions.