PSA, or Prostatic Specific Antigen, is a test 
that was once thought to be a valuable way to screen for prostate 
cancer. Unfortunately many studies have shown that screening every male 
does not seem to lower mortality rates.
 
 Many doctors have strong feelings about this. I still perform the test 
in men over 40, but may stop at age 75. The US Public health Task Force 
no longer recommends routine screening. 
 
 Now studies are being performed in subgroups to see when it might actually be useful. 
 
 In a large group in Sweden, researchers found that if screening was 
done at age 60, if the PSA level was less than 2.0 there was no 
advantage to further testing. However for levels of 2 or higher, 
mortality was decreased by continuing annual testing.
 
 My belief
 is that testing should be done annually until a man's life expectancy 
is less than 10 years. This is usually at about age 75 but in healthier 
adults can be later. But I have no solid scientific evidence for this 
opinion.

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