Hello, Welcome to Just Answer and thanks for your question. I'm so sorry to hear about your husband. His condition is dire with metastasized cancer that has not responded to radiation and chemotherapy. While we don't know how long he has left (only the doctors treating him would be able to venture a time-frame), it should not be more than a few weeks to months at most. You should ask his providers who have every bit of his medical information. They are really the only ones who know exactly how bad the situation is.