Pay not attention to the 'terminators' . . these are people who will try and give a person a timeline to death . . people are not statistics . . they are individuals. No one knows precisely how long a person will live after being diagnosed with metastatic lung or bone cancer. Survival depends on the type of tumor, grade, location of tumors, patient overall health, age, and response to treatment.
There is no real answer to your question . . you will always hear the worse case scenario from the terminators .. what you won't hear is that no one can really predict what will happen .. the patient may just surprise you and survive.