I was diagnosed with lung cancer 15 years ago. I was diagnosed on Friday 13/10. It took until 22/12 (many, many tests) until the doctors were confident to say they thought they may be able to operate, with a view to a cure.
Even that was wrapped up in "well your tumour maybe wrapped round your aorta, so we might have to stop, or your tumour may be be so close to your spine that we cannot remove it without paralyzing you, so do you want to go ahead?"
I found there were very many steps to take before decisions are made.
I was v v lucky. They could remove the tumour, I'm not paralysed.
But it was one hell of a journey. One that my family and friends also had to undertake.
If you want to be there with your friend, please, be sure you can be there throughout the journey. It may be a long one, or shorter one. It may end well like mine, or it may not.
I wish your friend all the luck I had.