Screening guidelines for prostate cancer: why are they so confusing?
When it comes to prostate cancer screening, many men are still confused about when they should be screened.
Fred Hutch experts recommend men at average risk for prostate cancer start screening at age 55 with the prostate-specific antigen (PSA) blood test. PSA tests are so effective that they’re credited with early diagnosis of prostate cancer in about 80% of men with the disease, however, it’s not without controversy.
A PSA test measures a protein released in the blood by prostate cells. A high PSA level can be a sign of prostate cancer, but it can also be due to conditions other than cancer, like an enlarged or inflamed prostate.
“Men who are at higher risk — Black men and those with a family history of the disease — should consider starting screening at age 40,” said Jamie Takayesu, MD, who treats prostate cancer patients with radiation. “Most men do not present with any symptoms, especially early on. If you have a long life ahead of you, that’s one reason to get screened for prostate cancer.”
When detected early, this cancer is usually curable. Therefore, screening can be helpful for younger, healthy men, and there are many treatment plans available if cancer is found, including active surveillance for low‑risk cases.
On the other hand, since PSA tests can identify cancers that might never become harmful, men with significant health issues or a limited life expectancy may decide that screening isn’t necessary for them. Talk with your primary physician about whether or not to do PSA screening.
PSA tests aren’t perfect: false positives (where the test incorrectly indicates you have cancer) can lead to unnecessary worry and/or unnecessary procedures like a biopsy, while false negatives can give you a normal result, missing an existing cancer.
False positives and false negatives are found in multi-cancer detection tests, (MCDs) as well.
“This is true of [the new multi-cancer] screening tests such as the ones marketed directly to consumers,” Takayesu said. “And most [MCDs] have not been validated the way PSA tests have.”
Without a provider to help you interpret results, Takayesu said, people using the new direct-to-consumer MCD blood tests might be lulled into a false sense of security, or conversely, undergo unnecessary procedures for a false positive test.
If you need a primary care provider, or want to discuss screening tests for prostate cancer, our care partner, UW Medicine, offers in-person and telemedicine primary care visits to both new and established patients in Washington state. Learn about UW Medicine Primary Care.