Each knee has two menisci, C-shaped wedges of cartilage that sit between the thigh bone and shin bone and act as shock absorbers and stabilizers. They spread load across the joint and protect the smooth articular cartilage from wear. When a meniscus tears, that protection is compromised, and the goal of treatment is to preserve as much of it as possible.
Meniscus tears come in two broad types. Acute traumatic tears happen in younger, active people during a twisting or pivoting injury. Degenerative tears develop gradually in older knees as the tissue weakens with age. The type of tear, its location, and the patient's age and activity all shape whether treatment is repair, trimming, or non-surgical care.
Symptoms of a meniscus tear
Common symptoms include:
- Pain along the joint line, on the inner or outer side of the knee
- Swelling that develops over hours to a day after the injury
- Catching, locking, or a sense that the knee is stuck
- Pain with twisting, squatting, or pivoting
- A feeling of giving way or instability
How meniscus tears are diagnosed
The exam, joint-line tenderness and provocative tests such as McMurray's, is highly suggestive. MRI confirms the diagnosis, shows the location and pattern of the tear, and helps determine whether it sits in the vascular zone that can heal. Plain X-rays do not show the meniscus but are used to assess for arthritis and overall alignment.
Whether a tear is ultimately repairable is often confirmed at the time of arthroscopy, when the surgeon can see and probe the tissue directly.
Dr. Lee's bias is to preserve the meniscus whenever it can be preserved. When a tear is in the vascular 'red zone' and the tissue quality allows, repair is preferred over removal, because keeping the meniscus protects the cartilage from the accelerated arthritis that can follow meniscus loss. Partial meniscectomy, trimming the torn portion, is reserved for tears that are irreparable or degenerative.
Many degenerative tears do not need surgery at all. Physical therapy, activity modification, and selective injections, including PRP in appropriate cases, often settle symptoms. Dr. Lee is among the first surgeons in NYC to use PRP for the upper extremity, and applies the same biologic principles, judiciously, in the knee. When surgery is indicated, it is done arthroscopically, and biologic augmentation is considered in selected repair cases to support healing.
Non-surgical treatment
Many degenerative meniscus tears, and some stable traumatic tears, improve without surgery. A structured program of physical therapy to restore strength and mechanics, activity modification, and selective injections is the first line for these tears. PRP is considered in selected cases. Studies show that for many degenerative tears, supervised physical therapy produces outcomes comparable to arthroscopic trimming.
Meniscus repair
When the tear is in the vascular zone and the tissue allows, the meniscus is repaired arthroscopically with sutures that bring the torn edges together so they can heal. Preserving the meniscus protects the cartilage long term. Repair recovery is more protected and longer than trimming: bracing, graduated weight-bearing, and roughly four to six months before return to sport. Biologic augmentation is considered in selected cases to support healing.
Partial meniscectomy
When a tear is degenerative or otherwise irreparable, the torn fragment is trimmed arthroscopically and the stable rim is smoothed, removing only what cannot heal. Recovery is quick, often days to a few weeks, because no tissue needs to knit back together. The trade-off is that removing meniscus reduces the cushion, which is why repair is preferred whenever feasible.
Recovery timeline
Recovery depends entirely on whether the tear was repaired or trimmed:
- Days 0–14After partial meniscectomy, crutches as needed and quick return to walking, with light activity within days to a couple of weeks. After repair, protected weight-bearing in a brace per the surgeon's plan.
- Weeks 2–6Meniscectomy patients progress to most daily activities and light exercise. Repair patients work on range of motion within protected limits and begin graduated strengthening.
- Months 2–4Meniscectomy patients typically back to full activity. Repair patients continue progressive strengthening with bracing weaned per protocol.
- Months 4–6Return to cutting and pivoting sport after a repair is typically in the four-to-six-month range and criteria-based, once strength and function are restored.
What patients commonly misunderstand
What patients most often misunderstand about meniscus tears:
- Surgery is not always necessary. Many degenerative meniscus tears improve with physical therapy, activity modification, and selective injections. For these tears, supervised rehab often produces outcomes comparable to arthroscopic trimming, and surgery is not the automatic answer.
- Repair is usually better than removal, when it is possible. Preserving the meniscus protects the cartilage from later arthritis. When a tear is in the vascular zone and the tissue allows, repairing it is preferred over trimming, even though the recovery is longer.
- A tear on MRI is not always the cause of the pain. Meniscus changes are common on MRI in older knees that are not symptomatic from the meniscus. Treatment is guided by symptoms and exam, not by the imaging finding alone.
This page is general educational content authored by Dr. Lee. It is not a substitute for individual medical advice. Every patient's case is different, book a consultation to discuss yours.