I, too, had open surgery. Your surgeon, Alan Partin at JHU, has a reputation as one of the best prostatectomists in the US. I had lymph nodes removed, but only a few near the prostate gland, on the outside chance the cancer had spread. Thankfully, it had not, and I am cancer free two years later.
P.S. Doubtless I will continue to be PSA-tested after age 75, if alive, despite recommendations to the contrary from a national medical committee