Bruce, it's vital to seek second opinions as several folks have suggested.

I've done it twice, and both times the treatment recommendations from two top-notch institutions have been astonishingly different. Asking the docs for the reasons underpinning their recommendations will give you confidence in your decision. In my case, after surgery one team said rads only. The other said rads plus chemo because of risk factors specific to my case, citing by number the relevant clinical trials. I'm no doctor, but when I looked those studies up my blood ran cold; I understood enough to know that I really did need to fight aggressively. I switched hospitals on that basis. My point isn't that you should or shouldn't have radiation; my point is that this decision is too important to base on just one medical team's particular experience and bias.

You don't have to wait to make an appointment with another hospital. Large teaching hospitals have better patient outcomes and would be ideal to consult.

I sense that 90% strikes you as pretty good odds. Find out if other docs are also that optimistic, since it seems crucial in your decision making. Not trying to be alarmist, but I've never heard that rosy statistic before.

I remember how tough it was to be in your shoes. Sorting out the options isn't easy. You're smart to come here for perspectives and you're on track to make solid choices that are right for you.

Good luck!