Hello, I too am sorry to hear about the ordeal with your mother.
My father had esopogeal (sorry about spelling) cancer that had spread to one lymph node. His cancer was advanced so he didn't have the chances your mother might have. Due to medical mistakes, my father passed away.
What I will suggest to you is please, read all of the information you can on this type of cancer. It is few and far between because it is somewhat rare. Also, make sure you trust your mother's doctors. My father's surgery was all done so quickly and looking back, I wish I had stopped and asked more questions.
Also, if your mother has a shorter neck, make sure they intubate her properly if they do surgery on her. My father had a different type of surgery than what was suggested for your mother and he had a shorter neck and the doctor that intubated him didn't do it correctly causing the first of many problems.
Basically, make sure you know what is going on with her condition every step of the way. Do not let the doctors push you aside. Get answers to all of your questions. If you have have any doubts about anything, get them cleared up. I want every person that has this type of cancer to have the chance of survival that my father never did.
I hope this helps!
Never compromise yourself. You are all you've got.