I was reading this oldbag and I'm so so sorry.
Both my parents have cancer, my mum died from it recently. I really feel your pain.
i agree about the stats. My Mum, with stage 4 breast cancer, was told at the beginning of Oct that the median life expectancy for her would be 18-24 months, she was dead two weeks later :( On the other hand my Dad, with stage 4 lung cancer, has a median life expectancy of 8 months from diagnosis. 18 months later, he's still here and doing well.
Median survival or life expectancy is the length of time by which half of the people will have died (and conversely, half will still be alive).
A word of caution from my experience - if your mum doesn't have very long and is in pain DO NOT go to hospital. Go directly to a hospice if you can. They are excellent in end of life care and controlling the pain. My mum was treated atrociously in hospital, they couldn't manage her pain because her condition was deteriorating so fast. It was really awful and I've submitted a formal complaint. The transport to the hospice was also horrendous. But once we got to the hospice, the care was amazing. It was also a much nicer environment for children to come visit and spend time with my Mum or for a family member to stay the night.
I'm so sorry you're going through this and at this time of year. I hope you do get some answers and decent care.