Hi there @Melburnian,
Sorry to hear about your diagnosis and need for additional treatment. Im 49 and have 2 teenagers and to be honest thinking about my kids was the worst thing emotionally.
I found it better not to worry about statistics and get on with the business of getting well. Chemo isnt the most fun you'll ever have but its doable. It sounds like all the right things are happening and we have very good healthcare in Australia so you will be in good hands. Once they know more you will feel more reasured that the treatment plan is in place.
Lean on us all here when you need.
Michele