Hi, @coachconnors - welcome to Mayo Clinic Connect. I've merged your post here so that you could meet others familiar with glioblastoma. I'm not able to provide any medical advice, not being a medical professional, but I'm thinking that other members in this discussion may have some thoughts about what you asked about the potential lifespan of someone with this disease who does not take chemo or radiation after surgery, as well as on experiencing glioblastoma in general.

@coachconnors, is this your personal diagnosis, or a loved one's? Have you or this loved one recently had surgery and are contemplating this decision?

Hello @coachconnors Nice to e-meet you here on Mayo Connect. I am Scott and my wife had surgery for her brain tumor and due to its location and the complications from surgery she made the decision not to have any chemo or radiation.

She fought her war for over 14 years, but I fully realize each patient and each tumor is very different.

Are you just asking out of general interest?

Strength, courage, and peace!