small cell lung and liver cancer

my mom has been in remisssion for 4 months now. she was diagnosed with small cell lung cancer. we were told her small cell lung cancer is back and now she also has 2 spots on her liver. her health has been very poor due to pnuemonia and various other things so the dr. says it wouldn't do much good to have chemo again. is there a treatment for liver cancer? does anyone know how long she may survive without treatment for her cancer on her lungs and liver? she has another scan on 3-17 but we won't see the dr. until 3-30 to find out anything. she is so weak and tired now. thanks.