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Prostate-Specific Antigen (PSA) Blood Test

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When Should I Have My PSA Levels Tested?

The American Cancer Society says men should talk to their doctors about the benefits, risks, and limitations of prostate cancer screening before deciding whether to be tested. The group's guidelines make it clear that prostate-specific antigen (PSA) blood testing should not occur unless this discussion happens. They recommend that most men at average risk for prostate cancer start the discussion at age 50 and those with higher risk for prostate cancer should start the discussion earlier.  

The American Urological Association recommends that men ages 55 to 69 who are considering screening should talk with their doctors about the risks and benefits of testing and proceed based on their personal values and preferences. The group also adds:

  • PSA screening in men under age 40 years is not recommended.
  • Routine screening in men between ages 40 to 54 years at average risk is not recommended.
  • To reduce the harms of screening, a routine screening interval of two years or more may be preferred over annual screening in those men who have decided on screening after a discussion with their doctor. As compared to annual screening, it is expected that screening intervals of two years preserve the majority of the benefits and reduce over diagnosis and false positives.
  • Routine PSA screening is not recommended in men over age 70 or any man with less than a 10-15 year life expectancy.

The U.S. Preventive Services Task Force, however, doesn't recommend routine PSA screening for men in the general population, regardless of age. They say the tests may find cancers that are so slow-growing that medical treatments -- which can have serious side effects -- would offer no benefit. 

If your doctor is concerned that you might have prostate cancer based on either a PSA level or a rectal exam, a biopsy (a lab testing of a small amount of tissue from the prostate) will be the next step. This is the only way to positively identify the presence of cancer.

What Does an Elevated PSA Level Mean?

Elevated PSA levels may indicate prostate cancer or a noncancerous condition such as prostatitis or an enlarged prostate.

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