My father has cancer that has started in his lungs, now gone to his stomach, his liver, skeletal, etc..he chose no treatment...He is 74...what might we expect as far as his body is concerned? Will things just stop working all at once and he will die? He's a lifelong smoker, never been sick a day in his life until now...May 2010 chest X-ray was clean, this may, he's covered in cancer. He is already on a lot of pain- killers and I think Morphine..seems pretty comfortable.