PSA ELISA test: what to know

ELISA is a laboratory technique that uses antibodies to detect and measure a target substance. In this setting, the target is prostate-specific antigen in a blood sample. The method describes how the laboratory measures PSA; it does not turn PSA into a stand-alone cancer diagnosis.

The report should be read with the laboratory’s units and reference information, symptoms, examination, medicines, and previous results. If further assessment is needed, a clinician may discuss the [PSA Test](/treatments/cancer-screening/psa-test/) and other investigations.

Check that the report belongs to you and ask the ordering clinician to explain the result in context. Mention infection, inflammation, urinary symptoms, catheterisation, or recent prostate procedures, because these may affect PSA.

Do not compare an ELISA result with an unrelated laboratory method without professional guidance. If the finding remains concerning, follow-up may include repeat blood testing, examination, or [MRI Scan](/treatments/diagnostics-and-staging/mri-scan/) before decisions about biopsy.

Arrange review for an unexpected result or persistent urinary symptoms. Seek urgent care if you cannot pass urine, or if urinary symptoms come with fever, chills, or feeling seriously unwell.

Ask what the ELISA result means in your laboratory’s report, whether another sample is needed, and which symptoms or findings would change the plan. Ask why MRI or biopsy is being considered before agreeing to the next investigation.