[AnnieBL]

This link may be useful:

http://www.mayomedicallaboratories.com/test-catalog/Clinical+and+Interpretive/81944

When I had higher readings, my free/total PSA ratio was good. I understand however that depending on where in the prostate a cancer begins, it can sometimes be well established before anything shows up in a PSA test. Hardly reassuring as to the value of the test and possibly what happened to your father.