Susie,
I read your post and just registered on this site a couple minutes ago as it struck me hard. I am 52 and diagnosed with the exact same thing as your partner yesterday.
I'm sorry that I can't provide any support to you at this time as I am just starting my journey myself. I can only imagine the wave of emotions the two of you are going through as I am. So much unknown in which fear creeps in.
I will stay in touch as I suspect our families will be experiencing similar challenges along the way. I wish you both the best!!
Jay