Rita - first of all, prayers for you and Andy! But I have a question: from the limited bit I know about surgically removing tumors, they want to see a "clean margin" - and I wonder how you know you have a clean margin with a laser?
My daughter had a young mare that had a red shiny cancerous growth on the top of her neck - chemo treatments had no effect on it, so my Vet surgically excised it. (I got to help him!) The tumor was maybe 3/4" across, and he took off a football-shaped chunk about 4" x 6" (EEKS!). It healed beautifully - there was always a slight "dent" in her neck, but she went on to win many ribbons in conformation and riding classes :-)