@jmab I just want to support and reinforce your posting.
I too would strongly advise 2nd opinions and, hopefully, one has access to a highly rated cancer center to do so.
And even with the very best cancer centers, even with a highly rated oncology team managing your treatment plan - the bottom line is that none of us know how our breast cancer will play out in the future.
One can do everything right in their lives and suffer a recurrence and vice versa.
We simply don't know.
But my personal opinion is to always give yourself the best shot you can, to stop those insidious, lurking cancer cells, who are very very tricky, from rearing their ugly face again.
To say it's not easy is an understatement. Strength and Good Health to All.