Sue,
It all sounds positive, even though it's still cancer. Strange to say, I know. I believe that negative margins and clear margins are the same. That just means that they got the entire tumour with some healthy tissue around the border so as not to leave any malignant cells behind. That might be a good indicator that he may not need additional treatment. Let's hope this is it for him and you can both move foward to new normal. Hugs to you. Rest well, my friend!