Meniscus Tear Surgery: What the New 10-Year Data Reveal
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By Dr. Jeffrey Peng, MD · Published July 29, 2026 · 7 min read
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Several years ago I made a video explaining why most people do not need surgery for a meniscus tear. It resonated with a lot of people, and yet the same two questions keep coming up in my clinic and in my video comments: do I need surgery for my meniscus tear, and will something bad happen to my knee if I skip it?
Those questions persist because surgery is still being recommended far more often than the evidence supports. An MRI report says "tear," and a scope gets scheduled. What has changed is the strength of the evidence against that reflex. We now have 10-year outcomes from the single most important trial in this field, and it shows that arthroscopic partial meniscectomy not only fails to beat a sham operation — it appears to leave patients worse off a decade later. Below I walk through that data and then explain what I actually do for these patients in my knee practice instead.
Is a Torn Meniscus Still a Working Meniscus?
This is the single most important concept to understand, and it explains everything that follows. Your menisci are C-shaped wedges of cartilage that sit between the femur and the tibia. Their job is mechanical: they act as a cushion, spreading load across the joint surface so that force is distributed rather than concentrated in one spot.
A torn meniscus is still a functional meniscus. It is frayed, it may be irritated, and it may hurt — but it is still sitting there doing its job as padding. When a surgeon trims it, shaves it, or cuts part of it out, that tissue does not grow back. You are permanently removing cushion from a joint that needs it. That is the trade-off patients are rarely told about, and it is the mechanism behind everything the long-term data now show.
What Did the 10-Year Sham Surgery Study Find?
The trial in question is FIDELITY, the Finnish Degenerative Meniscus Lesion Study, and its design is close to the gold standard for a surgical question. Researchers enrolled 146 adults between 35 and 65 years old with symptoms of a degenerative medial meniscus tear and no radiographic osteoarthritis. Every single patient went to the operating room. Every single patient had a camera placed in the knee to visually confirm the tear was really there. Only then were they randomized (Sihvonen et al., 2013).
One group had the actual arthroscopic partial meniscectomy — the damaged meniscal tissue was trimmed away. The other group had the surgeon mimic the motions and sounds of the procedure and then close the incisions with nothing removed. Patients did not know which group they were in, and neither did the people measuring their outcomes. That is what makes this trial so hard to argue with: the only variable that differed between groups was whether meniscal tissue came out.
At one year, there was no difference in outcomes. At two years, no difference. At five years, still no difference in symptoms or function — but the researchers began to see a signal of more radiographic knee osteoarthritis in the surgical group (Sihvonen et al., 2020).
The 10-year results were published in The New England Journal of Medicine in April 2026, with 91 percent of the original participants still being followed. Once again there was no benefit from surgery on any patient-reported measure. The adjusted mean differences actually pointed the other way, favoring the sham group: −9.4 points on the WOMET symptom and disability score, −5.1 points on the Lysholm knee score, and 0.86 points more knee pain after exercise in the surgical arm. Radiographic osteoarthritis progression was also more common after surgery.
Does Meniscus Surgery Increase Your Risk of Knee Replacement?
This is the finding that should change the conversation. At 10 years, patients who had the real meniscectomy were roughly three times more likely to have gone on to a knee replacement or a realignment osteotomy than patients who had a sham operation — which is to say, than patients who had nothing removed at all.
Put those two findings side by side and the picture is unambiguous. The surgery does not make you feel better than a placebo, and a decade later it is associated with more arthritis and a substantially higher chance of ending up with a knee replacement. A lot of patients walk into my office assuming meniscus surgery is close to 100 percent successful. It is not. For degenerative tears, the honest summary is that it does not work and it may cause harm.
Which Meniscus Tears Does This Apply To?
This matters, and I want to be precise about it. FIDELITY studied degenerative meniscus tears in middle-aged adults — the wear-and-tear tears that show up on MRI in people in their forties, fifties, and sixties, often with no single injury they can point to. That is the population these results apply to, and it is the large majority of meniscus tears I see.
Acute traumatic tears in young athletes are a different problem. A large displaced tear, a locked knee that will not straighten, or a repairable tear in a healthy young knee can be a legitimate reason to operate, because there the goal is preserving meniscal tissue rather than removing it. If you fall into that category, surgery deserves a real conversation. If you are a middle-aged adult whose MRI shows a degenerative tear, the evidence says slow down.
Why Is Physical Therapy Still the Foundation?
I actively try to steer my patients through the non-surgical options first, and physical therapy remains the base of that. Exercise does not heal or repair the meniscus, and I never promise patients that it will — that is not the point of rehab.
The point is that stronger muscles protect and support the joint, which reduces how much load the irritated meniscus has to absorb. And the strength deficits in these knees are real and measurable. Research quantifying quadriceps strength in patients with degenerative meniscus tears has documented substantial weakness in the injured leg compared with the uninvolved side (Eitzen et al., 2016). In my experience that lingering weakness — not the tear itself — is why so many people keep having trouble long after the original injury.
What If Physical Therapy Isn't Enough? PRP for Meniscus Tears
Here is where people used to get funneled toward the operating room: they hurt too much to participate meaningfully in therapy, or they finished a full course of therapy and still hurt. For years those were the patients who ended up with a scope. Now there are better options.
One of them is platelet-rich plasma, or PRP. We draw your blood, spin it in a centrifuge to separate it into layers, and concentrate the layer containing your own platelets and growth factors. That concentrate is then injected back into the knee under ultrasound guidance.
What has changed my own practice is where the injection goes. A group in Spain treated 392 cases of meniscal injury with a combination of intra-articular PRP — into the joint itself — and intrameniscal PRP, injected directly into the meniscal tissue under imaging guidance. Over follow-up, 90.3 percent of those patients never went on to meniscus surgery, with an estimated mean survival of about 54 months, and KOOS pain and function scores improved significantly at both 6 and 18 months (Sánchez et al., 2023). That is the protocol I use: PRP into the joint, PRP into the meniscus itself, paired with a real strengthening program.
Can Shockwave Therapy Help a Meniscus Tear?
The other tool I reach for is shockwave therapy. A handpiece is applied to the knee and delivers high-energy acoustic waves into the tissue. There are no needles and no medication involved, the side effect profile is minimal, and the mechanism appears to be mechanical stimulation of the tissue that triggers growth factor release and reduces pain.
It is not a replacement for strengthening, and I do not present it as a cure for a tear. I use it as a way to bring pain down far enough that patients can actually do the rehab that makes the difference, and in some cases as an alternative for people who would rather avoid an injection.
What I Recommend in My Practice
The patients I see with degenerative meniscus tears are usually active people — pickleball, tennis, running, swimming — who want to keep doing those things. The combination of intra-articular and intrameniscal PRP plus a structured strengthening program gets the large majority of them back to their sport. No operation, no removed cushion, and none of the long-term arthritis and knee replacement risk that comes with a meniscectomy.
If your MRI shows a meniscus tear and someone has already scheduled you for a scope, it is worth getting a second opinion from a physician who does this non-surgically before you commit. You can schedule a consultation to talk through whether these options make sense for your knee.
References
1. Kalske R, Sihvonen R, Paavola M, et al. Arthroscopic partial meniscectomy for degenerative tear — 10-year outcomes. N Engl J Med. 2026;394(17):1757-1759. doi:10.1056/NEJMc2516079
2. Sihvonen R, Paavola M, Malmivaara A, et al. Arthroscopic partial meniscectomy versus sham surgery for a degenerative meniscal tear. N Engl J Med. 2013;369(26):2515-2524. doi:10.1056/NEJMoa1305189
3. Sihvonen R, Paavola M, Malmivaara A, et al. Arthroscopic partial meniscectomy for a degenerative meniscus tear: a 5 year follow-up of the placebo-surgery controlled FIDELITY trial. Br J Sports Med. 2020;54(22):1332-1339. doi:10.1136/bjsports-2020-102813
4. Eitzen I, Grindem H, Nilstad A, Moksnes H, Risberg MA. Quantifying quadriceps muscle strength in patients with ACL injury, focal cartilage lesions, and degenerative meniscus tears: differences and clinical implications. Orthop J Sports Med. 2016;4(10):2325967116667717. doi:10.1177/2325967116667717
5. Sánchez M, Jorquera C, Bilbao AM, et al. High survival rate after the combination of intrameniscal and intraarticular infiltrations of platelet-rich plasma as conservative treatment for meniscal lesions. Knee Surg Sports Traumatol Arthrosc. 2023;31(10):4246-4256. doi:10.1007/s00167-023-07470-4
Medical Disclaimer: This content is for educational purposes only and does not substitute for the medical advice of a physician. Always consult your healthcare provider before beginning any new treatment program. The information presented reflects the opinion of Dr. Jeffrey Peng and does not represent the views of his employers or affiliated hospital systems.
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