Hi Raymond,
First of all congratulations! I think I am a right person to answer your question because my tonsil cancer was also stage 4B.I didn't have any neck dissection. I remember having the MRI, CT scan and ultrasound two months after completing radiation and chemo treatment to confirm the status of my cancer. In between the time when I had appointment with my oncologist, he also said there was the possibility of operation. I could still feel the lump on my left neck then and wasn't sure if it was cancerous or not. My oncologist could not give a straight yes or no. So the waiting time was a rather hard one until the results of the tests were known. So there is nothing you can do now and even if surgery is necessary,it should be a fairly easy one with a much smaller tumor.

Karen stage 4 tonsil cancer diagnosed in 9/01.