Positive margins ie some cancer left where the surgeon cut.
High G score that hadn't previously been detected.
Seminal vesicle invasion.
Personally I think the Urologist is just referring you to Oncology because he cannot do anymore, that is a positive.
You still have detectable PSA after a prostatectomy, that is a negative. So you can't say you are cured, but until it goes above 0.1 and keeps rising you can't say you have a recurrence either. But as with lots of cases on here you may think you are cured and then 15 years later it comes back from nowhere, that is the nature of the beast.
I have been on this forum long enough to remember when adjuvant radio therapy was in favour for cases like yours (and mine). That approach led to over treatment and poor QOL. All the latest research says it ok to wait until 0.2 IF you are low risk Gleason etc.