No doctor can tell her what her survival percentage rate will be. Pulling a number as specific as that out is bad doctoring. Every person is a unique biological entity, and no two are the same. Perhaps in some study of a large group of people you could extrapolate estimates of what happened to the group, but you could not predict what happens to any singular person in the group. There are two good articles about this specific idea in the treatment section of the OCF web site under diagnosis. They speak to probabilities and statistics.

The danger in telling patients anything is that no matter what you tell them, you can create a situation that damages them emotionally and leads them to believe and behave in a way that impacts their outcomes. A self fulfilling prophesy. Every patient wants to know two things, why me and what are my odds of surviving this. Both these questions are a waste of intellectual and emotional energy.

Please reinforce in her that the future is not preordained, and that outcomes are dictated by individual genetic biology, and quality of care. One you have no control over so thinking about it is a waste of time. The other is something you can impact by getting treatment in the best facility and by the best treatment team you have access to. And yes, where you get treated makes a difference. Peer reviewed published studies have shown this repeatedly. Do not let geography and convenience dictate that team.