Harvard Men's Health Watch

Your PSA test result: What's next?

If the test result hints at cancer, your doctor will need to rule out noncancerous causes and may perform additional tests.

When you take a test for a serious medical condition, most of all you want certainty: Do you have the disease, or do you not? But the only thing that you can rely on about PSA testing for prostate cancer is that the results will be uncertain.

"The problem is that PSA is a nonspecific measurement," says Dr. Marc B. Garnick, a prostate cancer specialist at Harvard Medical School and Beth Israel Deaconess Medical Center. "It can mean you may have cancer, nothing more."

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