My uncle Spero had that years ago and had radiation treatments, which completely removed the cancer. I THINK they removed his thyroid also, but I'm not sure. He was in the VA Hospital in San Antonio and received excellent care. Of course, he attributed his recovery to the fact that he swallowed a tablespoon of Vaseline EVERY MORNING, and believed that would cure everything that ailed you. I kid you not. That's why I laughed so hard at "My Big Fat Greek Wedding." Greek men really ARE like that!!!
Anyway, he had the cancer in the 1970's and didn't die until 2000, when he was 85. He had Alzheimer's, which runs in my mother's side of the family. He never had a recurrence of the cancer, though.
Keep us posted on your mom, okay?
Love,
Nina