Thanks, Deb. And yes, that is the mast arm with 14 nodes removed. Actually I do very little lifting, but I do almost all of it with that arm because of a shoulder injury to the other one. I rarely lift and 20 # is my limit -- just groceries and laundry and the occasional dog under 20 #. I did wave at someone with that arm -- that's when I noticed the pain. Got a sleeve on it right now and we'll see how it feels tomorrow. Thank for the info on radiation.