I'm not as smart as a lot of you guy's.
But I would think any PSA of .0 any number would be good......
That really depends. After RP, much depends on your path report and PSA. For some pT3 men, adjuvant therapy may be obviously required from the G score and adverse features. For others it may depend on persistent PSA
in the months they are recovering from surgery. If, say, your 6-week PSA is 0.09, and your 3- month goes up, e.g., to 0.15, you'll want confirmation of a rising PSA, but probably planning for adjuvant therapy, even if it's just an advanced scan. And for others a rising PSA with more decimal places gives you more heads-up time to discuss BCR with your doc.
For other pT3 men, a low, but clearly rising PSA will mean drawing up an early or very early salvage-therapy plan and, perhaps, deciding on a PSA "trigger value" for when to begin.
On the other hand many G6 men with no adverse features are followed indefinitely with a standard test and live happily ever after with a string of <0.1, the kind of "undetectable" that doesn't tell you much about
your actual PSA level because it isn't critical.