I agree with AUS. They did mine only four weeks after surgery because that's what my California surgeon wanted. But my Vegas urologist, who took the blood, cautioned that PSA has a half life of 18 days or so, and I might expect some detecable level of PSA, in which case they would have to redo the test four weeks later.
Luckily it was undetectable.
55 years old
PSA = First ever was 9.8 in late Oct. ‘06, two weeks later, 10.1
Biopsy results 11/22/06 (6 out of 8 cores positive), both lobes, Gleason 3+3 = 6
Da Vinci Robotic RP surgery, City of Hope, Jan 12, 2007
Post surgery pathology – Organ confined, Gleason still 6, margins clear.
First post-surgery PSA -- Undetectable, 2/20/07
Second post-surgery PSA -- Undetectable, 9/11/07