i had the same unfortunate experience as "thoosier". my doc went by the psa 4 limit. for 6 years he said, with my enlarged prostate ( but no difficulty in passing or holding urine flow) he said 'don't worry, you are ok.my psa ranged from 3 to 4 in those years.
in january 2007 when a severe backpain hit me and i had to be hospitalised and diagnosed, one test led to another and finally prostate and hip bone biopsies confimed cancer. note, that at that time my psa was only 2.8!!
recently my brother-in-law in australia , told me that many oncologists there set i.8 as the level of caution, where tey start going deeper into diagnosis. these psa numbers are still somewhat unclear, and only doctors who hve treated hundreds/thousands of patients in clinics where they work in teams and share in the diagnosis, can reasonably predict
cancer in their patients as related to specific psa numbers. pitchappan patient