Heard my latest PSA result - 0.4 ( 21 months after CyberKnife treatment in April, 2011). So I broke through the "magic" 0.5 level. Ideally, my Uro. wanted to see < 0.5 after 24 months, so he should be happy and not be getting any (crazy) ideas - like another biopsy (?).
Dr. Katz says anything < 1.0 at 24 months is fine. Some guys take several more years to get there. Recently one guy on the CK Forum took 59 months ( almost five years) to get below 0.5 . He had a few "bounces" along the way, but had a general downward trend along the way.
JAVGuzzi