I'm so glad I found this thread, I too have the same feeling in my throat. I initially put it down to my portacath, as it started at about the same time (and on the same side) as I had it fitted, but it's been over a year since it was removed, and if anything it's worse now than before. I'm on Letrazole not on Tamoxifen (and it started well before I began hormone therapy) I also had mastectomy, 6 FEC and no rads. It's on the same side as the chemo was administered, opposite side to the mx.
It sometimes feels like someone has their hand tightly pressed against the right side of my neck, or as if I had something stuck in my throat. Sometimes it seems to have its own pulse! It covers the area from my collar-bone to just below my right ear. I do have an underactive thyroid, but am on medication and sucessfully control it. I was sent for scans to try to find what was giving me the symptoms (they suspected an aneurysm) but the scans showed nothing.
Interesting about the Crohn's disease, as I've been wondering if I am starting to get that as I also have type 1 diabetes and Hashimoto's disease, which are both, like Crohn's, auto-immune problems. I wonder if there is a possible link there?
My gp said I would have to learn to live with it, huh!