Degenerative Meniscus Tears: What the Latest Evidence Says About Surgery

If an MRI shows a torn meniscus, surgery may sound like the obvious fix. For the common age-related kind of tear, strong research shows surgery usually is not the answer. Here is what that means for your knee.

If an MRI has shown a meniscus tear in your knee, surgery may have been mentioned as the obvious next step. For the most common kind of tear — the age-related kind — years of high-quality research say that surgery usually is not the answer. This post explains why, in plain terms, so you can ask better questions before agreeing to an operation.

Why an MRI tear does not automatically mean surgery

The meniscus is a C-shaped pad of cartilage that cushions the knee. There are two broad kinds of tears, and the difference matters. A traumatic tear comes from a specific injury, like a twist or a fall, usually in a younger knee. A degenerative tear develops slowly as the cartilage wears with age, often alongside early arthritis, and frequently without any single injury you can point to.

Here is the part that surprises most people: degenerative tears show up on MRI scans of plenty of knees that do not hurt at all. So finding a tear on your scan does not prove the tear is causing your pain. Often the real source is the surrounding arthritis, and the tear is just something the scan happened to catch.

What the FIDELITY study found

FIDELITY was a rigorous study that compared the standard keyhole surgery for a torn meniscus against a fake (placebo) procedure. Because patients did not know which one they received, researchers could tell whether the surgery itself actually helped — separate from the boost people often feel just from having a procedure done.

The answer was clear: the surgery worked no better than the placebo. A 10-year follow-up published in 2026 went further. Not only did surgery fail to beat the placebo — the people who had the real operation tended to do somewhat worse over time, with a bit more arthritis in the knee and a greater chance of needing further surgery later. FIDELITY is not a one-off; several earlier studies reached the same conclusion for age-related tears.

What about clicking, catching, and locking?

Many people with a degenerative tear notice occasional clicking or catching in the knee. On its own, that is usually not a reason for surgery, and it often improves as the knee gets stronger and calmer.

True locking is different. If the knee physically gets stuck and you cannot fully straighten it, that can mean a torn fragment is actually blocking the joint — and that is worth evaluating promptly. The goal of a good exam is to tell the difference between a knee that clicks and a knee that is genuinely locked.

When surgery may still be appropriate

Surgery is not always the wrong answer. It can be the right choice for a knee that truly locks because a torn piece is blocking movement, for some traumatic tears in younger, active people, and for certain specific tear patterns. These situations are different from the common age-related tears studied in FIDELITY. The problem is not the operation itself — it is using it by default for degenerative tears where the research shows it does not help.

What to try first

For most degenerative tears, the evidence-based starting point is simple: a progressive strengthening program for the muscles that support the knee, activity adjustments, and some time. This is not a consolation prize — in head-to-head studies, this kind of structured care matched the results of surgery.

When a degenerative tear occurs alongside knee arthritis, other treatments may be considered. PRP may help some people with arthritis-related knee pain and function, but it has not been shown to repair a degenerative meniscus tear. Whether it is a reasonable fit depends on your exam, your imaging, and what you have already tried.

The bottom line: a meniscus tear on an MRI is a starting point for a conversation, not an automatic ticket to the operating room.