I am 15 months post tx and have very few lingering side effects worthy of mention. One that is present is what you describe: tightening of the neck area. I have this and just have to stretch and turn and raise my head to stretch the area, just on the side where the enlarged nodes were. There is also a slightly raised area along the nodes but zero pain.

I also get a shooting pain/muscle spasm under my jaw once in awhile. Just work it out like a leg cramp. Overall, neither barely registers on the complaint meter.

Good luck