Hi @SueD, I told my teenagers that I have early breast cancer, that I am going to be fine, and then that I was having surgery (thankfully they didn't ask the extent of the surgery as I had a double mastectomy) and now chemotherapy. They are a bit on the anxious side, but they're doing ok, apart from niggles. I've been open with them and told them all the basics, but not told them any more detail than necessary if that makes sense.
The nurses told me to keep up routine as much as possible. One daughter is travelling for six weeks on a scholarship and they said to go ahead with that as well, even though when it was offered I was waiting on my staging scans and a bit worried (they came back clear).
I don't know if anyone mentioned it, but Cancer Council have a booklet 'Talking to Kids about Cancer.' It recommended letting the school know, but also to check with the kids about doing that. My daughters asked me to tell selected teachers so that's what I did, and the teachers are going to keep an eye out for them.
I know it can be hard to get counselling for kids at the moment, but an educational psychologist might be good for your son - we found a lovely one for my daughter a while back, because she was having perfectionist issues with her schoolwork and that got sorted. Just a thought that there might be overlap with your son being very bright and also anxious. That is often the case, smart kids think a lot.
Big hugs and yes you can do this. xo