How well she handles it depends on her pain tolerance. There are professional athletes who have performed at a high level for a temporary period of time. There are also those who couldn't go at all. The thing about meniscus tears is it depends on where the tear is. If it's in the middle, it can't heal. If it's on the very edge, there is blood supply to that area and it can heal, though that doesn't of course mean it will. A Baker's Cyst can also cause pain, or not, but that won't get worse. Usually in these circumstances you would see the orthopedic surgeon and get an opinion on whether or not such activity would cause things to get worse. If you don't do that, you really can't know. If it does tear more, she won't be able to walk at all at some point, especially on stairs or hills. How bad the tear is also determines how invasive the surgery will be. Many docs will do a simple laproscopic, which allows you to get going again quickly but often just leads to further injury. A repair is a better option usually but has a much longer recovery, but leaves behind a stronger piece of cartilage. Of course, over time, it's very possible the knee will give out again, as that's often what happens if you stay active doing things that put stress on the knee. But it can buy a lot of time before that happens. Is there any chance, and I say this knowing surgeons hate talking to patients, of phoning the surgeon she has that appointment with and seeing if he can at least evaluate the MRI and tell her if a brace would be enough to allow her to do this? She's been going since April and apparently can still get around, though it hurts, but again, having had a surgeon tell me I had a torn meniscus and the radiologist tell me I didn't and then another specialist telling me I didn't, my knee hurts and then doesn't and it's been years, but I've never been able to run again and I still can't tell you years later what I actually have. I was sent to PT. In this case, though, the radiologist has found a torn meniscus, and so yeah, it can keep tearing. Whether walking around Disneyland will do that to you or not I can't say, it's not like she's playing basketball or football or something. Peace.