What's the prognosis for stage 3b non small cell lung cancer?

Not good: Stage 3b non-small-cell-lung cancer is a very heterogeneous group of patients and as such there is no unanimous hard data on survival, unlike the earlier stages. Some may benefit from chemo- and radiation therapy to shrink the tumor and be resected. My advice is to go to the most renowned lung cancer specialist that is available to you and hope for the best.

Have hope: As noted by other physician, there are statistical based survival estimates by stage. But, each patient is an individual. It is most critical to speak with your cancer team. They will develop multi-disciplan approach and treatment plan and have a more personalized/individualized determination of reasonable individual prognosis.