I'm sorry to hear about your stepfather's diagnosis. It's understandably a difficult time for you all and natural that you will have questions about treatment and prognosis.
It's best to ask his care team these kinds of questions as there will be many different factors that play a role in potentially available treatment options and his prognosis.
I hope that as a family you're able to get the information needed to support your stepfather, and each other, through this difficult time.
