Re: Knee surgery or shots and rehab?
It's tough to say. The surgeon will want to see the actual pictures from the MRI, so make sure that he has the films or disk. He'll look at it and decide whether it's likely to heal on its own and how much he can do to improve things if he operates on it.
There are two basic types of meniscus surgery. Sometimes a surgeon simply removes the damaged portion, to make it neater and prevent the tear from catching when you move your knee. Sometimes the surgeon sews the tear up.
The first one is easier to recover from, the second has better long term outcomes. Pretty much, if there's a major meniscus tear, you want to have it sewn up IF the surgeon thinks the repair is feasible.
I'm not sure how much that helped, but there it is.