I am so sorry Val that the outcome wasn't better than this.
We do the best we can for our men, in looking after them, making sure they eat the things that are good for this disease rather than what they think they want! and we tend to mother them too don't we.
Your husband has quietly been coming to terms with this result in his own way as shown by part of your post
"Although tears kept coming throughout the day he took the whole thing very calmly, saying he knew something was very wrong."
Throughout the days leading up to the scan he has been worrying about you and how you will cope and that is a measure of his love to you, that he can think of you at a time like this. 50 wonderful years together is something of an achievement and I hope that the closeness you have developed during that time will now help you both on the next stage of his journey.
Be strong for him, and yourself. I know it's very hard but if he sees you worrying about the future it will make it harder for him.
We are here for you if you need us so please use us. Any advice just ask, somebody will know or have experienced it.
Thinking of you both