Question 1

How accurate is the PSA test for detecting prostate cancer?

Accepted Answer

The PSA test is a valuable screening tool, but it's not definitive for diagnosing prostate cancer. Elevated PSA levels can indicate cancer, but they can also result from benign conditions like enlarged prostate or prostate inflammation. Studies show that about 25% of men with elevated PSA levels actually have prostate cancer, while some men with normal PSA levels may still have cancer. The test is most useful when combined with other factors like digital rectal examination and family history.

Question 2

What factors can affect my PSA levels besides cancer?

Accepted Answer

Several factors can temporarily or permanently affect PSA levels. Age naturally increases PSA levels over time. Benign prostatic hyperplasia (enlarged prostate), prostatitis, urinary tract infections, and recent sexual activity can elevate levels. Certain medications like finasteride or dutasteride can lower PSA levels. Recent procedures like prostate biopsy, catheter insertion, or vigorous digital rectal examination may also cause temporary increases. Race can be a factor too, as African American men typically have slightly higher baseline PSA levels.

Question 3

How often should I get PSA testing?

Accepted Answer

How often to test depends on age, risk factors, prior PSA values, symptoms, and a shared decision with a healthcare provider. Guidelines do not recommend automatic yearly PSA screening for every man at a fixed age. Men at average risk, higher risk, or with prior abnormal results may follow different intervals based on individualized discussion of benefits and harms.

Question 4

Can I take this test if I'm currently taking prostate medications?

Accepted Answer

Yes, you can take the PSA test while on prostate medications, but it's important to know that some medications significantly affect PSA levels. Medications like finasteride (Propecia, Proscar) or dutasteride (Avodart) can reduce PSA levels by approximately 50%. Alpha-blockers like tamsulosin typically don't affect PSA levels. Be sure to inform any healthcare provider reviewing your results about all medications you're taking, as they may need to adjust the interpretation of your PSA levels accordingly.

Question 5

What should I do if my PSA level is elevated?

Accepted Answer

An elevated PSA level does not necessarily mean prostate cancer, but it should be reviewed with a healthcare provider. Next steps may include repeating the test, checking free PSA or other risk markers, reviewing medications and recent activities, performing a digital rectal exam, or referral to a urologist. PSA values in the 4-10 ng/mL range can still be clinically important, especially if increasing over time.

Question 6

Is there anything I should avoid before taking the PSA test?

Accepted Answer

To ensure accurate results, avoid ejaculation for 24-48 hours before the test, as sexual activity can temporarily raise PSA levels. Don't schedule the test immediately after a digital rectal exam, prostate massage, or bicycle riding, as these can also affect results. If you've had a prostate biopsy, wait at least 6-8 weeks before testing. Urinary tract infections can elevate PSA, so if you have symptoms of a UTI, it's best to treat the infection first and then test a few weeks later.

PSA (Prostate-Specific Antigen)