Hi,
I'm new to this site & as yourself...looking for answers. My husband went through tonsil cancer (stage3) chemo & rad but not the neck dissection even though it was in the lymph nodes. We were "all clear" as of August, 09 but he has continued with a sore throat, dryness & the whole voice changing dilemeia. We were told...give it time...this is normal...changes in the lymph flow pattern. Now as continued concerns the ENT found a suspicious patch under a flap of skin in the tonsilliar region.(orginal site) Biospy scheduled for next week.
I wish I had an answer for you but I would keep persuing the issue. My understanding was that all the side effects from treeatment were to get better with time. If you have concerns, I would continue until a professional can give you a reason for the voice change.
Good Luck.