Although not diagnostic, a simple blood test called PSA (prostate specific antigen) can help detect prostate cancer years before symptoms develop. While it can be somewhat inaccurate, a baseline PSA test before the age of 50, then annually past that age, can be very helpful in detecting the disease long before it becomes a major problem. Because the incidence of prostate cancer is rare in men under the age of 30, but increases with each decade after that, there is little benefit in starting screening in your 20s or 30s unless there is a strong history of prostate cancer in your family.
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