Peter,
I will say a prayer for you tonight. May the Lord be with you throughout this process - providing the best medical care possible, comfort when you need it most, and ultimately a speedy & complete recovery.
If you can stay strong mentally and spiritually, you will beat this. And when it comes time for physical therapy, if they say do ten of some exercise and you feel like quitting at five, do twenty. I speak from experience having survived a life threatening illness (but thankfully not cancer). God gave me my miracle and he can do it for you.
I sincerely hope you are back to making sawdust soon. Of course with Festool, you'll have to look inside your CT to find it.
Be well my friend!
Joe