
there,
What do you mean by 'the odds are good?' Will you need chemo or radiation or is it benign?
The first thing that catches my attention is YOU are being diagnosed but worried about how HE will take it.
In a normal world you should be able to express exactly how it and what you are feeling. ( even considering his past...this is what is trust is about)
Coincidentally I just posted last night a similar situation about my bpd ex and my diagnosis. We got a scare back in October because some significant markers in my body were skyrocketing... it could mean cancer or some kind of autoimmune disease.
'luckily' it turned out to be the latter.
What I could have done differently looking back (we already broke up) is keep him involved more.
If it is not life threatening I think it will help him to be reminded of that by you and telling him everything about it. It wil allow him to feel close to you, a bit more in control and dampen the fear.
I wish you strength in your journey back to health!