Lymph node dissection/shoulder drop

I had a lumpectomy (2cm) and lymph node dissection. The surgery caused my shoulder to drop.  My arm is uncomfortably close to my body, and my spine has curved causing neck and upper back pain.  How common is this complication?  Can anything (physical therapy) help?  I have asked my surgeon and he would not comment. And, I haven't been able to find any info on the web.
Any information would be appreciated.  Thank you.

[CCF-RN,MSN-rf]

Dear osteoradionecrosis:  I

[Osteoradionecrosis]

I had set up the nickname "osteoradionecrosis" when I posted a previous question, (regarding yet another uncommon complication I've experienced).  Apparently I keep drawing the short straw.  And, getting answers to the uncommon has been difficult.  Thank you for yours.

[auctionmama]

Hi - You don't mention when your surgery was, so this may or may not help. I experienced the same type of thing post-surgery, but it went away after about 6 weeks. My surgeon had me doing the "hand walk up the wall" exercises, and that really helped get it back to normal. My natural arm swing didn't return for at least 2 months.

Best wishes,
Verna