Dear Chere
I'm sorry about your husband's diagnosis of SCC, it is a shock when you hear those words. As Anne-Marie has said, an advanced stage does not necessarily mean it is untreatable. Five years ago this week I was told I had Stage 4 tonsil cancer and yet after treatment I am well and leading a normal life apart from dry mouth etc.
From my experience I would say that acceptance is the key to being able to deal with the journey you are both undertaking. Support for you both will make a difference and you have found a wonderful source here of understanding and knowledge.
I send best wishes to you both, love from Helen