You'll need to see an orthopedic surgeon to answer this question. X-rays, MRS, and an exam will be used to test the knee. The location of the pain and what makes it better or worse will also help guide the surgeon.
X-rays show how wide the joint space is. A narrow space is a sign of cartilage thinning and early arthritis. An MRI can show the joint space, shape of the joint, and the status
of the cartilage.
The MRI signal can also be used to look at the height, width, and any movement of the meniscus. Even so it's very hard to tell if the meniscus is torn just with an MRI. The doctor must rely on all these tests to make the diagnosis.