Prostate-specific antigen (PSA) test is a blood test used as a screening tool to help diagnose prostate cancer. Although an elevated PSA can be consistent with cancer, it is possible to have an abnormal PSA without cancer. The next steps after an abnormal PSA are imperative to identifying cancer if it exists.
Biopsy
The only definitive test to diagnose prostate cancer is a biopsy. There are several techniques used to perform a biopsy.
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