Hi and welcome to HCM.
I am sorry about you mom and this serious diagnosis. Unfortunately this is not treatable. Treatment is only palliative and prognosis is very bad for stage IV with liver
metastasis with stopped chemoth. It is hard to predict anything but life expectancy is by statistics 3-6 months. Everything depends on her general health, nutrition status and tumour size. You should give her all support and make esier by treating her pain, nausea
etc. WIsh you good health.