prostate specific antigen (psa)
Cancer ScreeningBlood sampleResults 2-3 daysNo fasting
Prostate Specific Antigen (PSA)
A simple blood test that measures prostate-specific antigen, a protein made by the prostate gland. It is commonly used to screen for and monitor prostate conditions, including prostate cancer.
Sample
Blood
Results
2-3 days
Fasting
Not required
Follow-up
Optional add-on
What this test detects
Total prostate-specific antigen (PSA)
ECLIA · serum
Quantitative · ng/mL
When to get this test
Prostate cancer screening
Helps assess prostate cancer risk in men, often alongside a digital rectal exam.
Monitoring known prostate conditions
Tracks PSA levels over time in men with an enlarged prostate, prostatitis, or a prior diagnosis.
Treatment follow-up
Monitors response after prostate cancer treatment such as surgery or radiation.
How to prepare
01
Avoid ejaculation for 48 hours before the test, as it may temporarily raise PSA levels.
02
Inform the lab if you recently had a prostate exam, biopsy, or urinary procedure.
Common questions
How long do results take?
Results are typically ready within 2 to 3 days.
Do I need to fast before the PSA test?
No, fasting is not required. You can eat and drink normally before your blood draw.
What does a higher PSA result mean?
An elevated PSA can be caused by several conditions, not just cancer, including an enlarged prostate or inflammation, so it is interpreted in context.