I'd suggest asking the surgeon at Northwestern, based on your tests, whether he thinks he'll be able to spare the nerves. I'd also suggest asking him what he thinks, for your specific case, what your odds of incontinence and ED are based on his experience and record. When I asked my surgeon those questions he told me he was very confident (based on the tests) that he'd be able to spare my nerves, and at 1 year I'd have a 90% chance of being continent and 70% of no ED. In my case, after surgery he told me everything was exactly as expected and he was able to spare the nerves. Of course, if things had been different when he got in there, he'd have done what he needed to do. But my point to you is don't assume either way; ask the expert what he thinks. He's seen a lot more than any of us have. Best wishes.