conv: My father was diagnosed with stage 4 brain cancer. It only took a few months for him to pass away because of it. My father was diagnosed with stage 4 brain cancer. Oh no! I am so sorry to hear that. That must be very difficult for you and your family. Yes it was. It only took a few short months and my father passed away due to it being inoperable. I am so sorry for your loss. I hope that you find peace in this difficult time.