Meniscus Injury Treatment — Cost, Top Hospitals & Success Rates | MyMedicPlus

The menisci are two C-shaped fibrocartilaginous discs — the medial meniscus and the lateral meniscus — located between the femoral condyles and the tibial plateau within the knee joint. They are structurally composed predominantly of Type I collagen arranged in a complex circumferential and radial fibre architecture, designed to convert compressive loads into circumferential (hoop) stresses distributed across the tibial plateau.

The menisci serve multiple critical biomechanical functions:

• Load transmission: The medial meniscus transmits approximately 50% and the lateral meniscus approximately 70% of the load across the respective compartments. Loss of meniscal tissue directly increases contact stress on the articular cartilage.
• Shock absorption: The menisci reduce peak impact forces on the articular cartilage by approximately 20% during normal walking and significantly more during running and jumping.
• Joint stability: The medial meniscus is a secondary stabiliser of the knee against anterior tibial translation, particularly important in ACL-deficient knees.
• Lubrication and proprioception: Synovial fluid distribution and mechanoreceptors within the meniscal horns contribute to joint lubrication and proprioceptive feedback.

The clinical significance of meniscal tears lies in their relationship to knee osteoarthritis: partial meniscectomy — long considered routine — is now known to accelerate articular cartilage loss. A landmark radiographic study (Roos et al., Ann Rheum Dis, 1998) showed that patients who underwent total meniscectomy had a 5-fold increased risk of radiographic knee OA over 21 years. Preservation of meniscal tissue through repair is therefore a primary surgical goal.

Medial vs Lateral Meniscus

The medial meniscus is more firmly attached to the tibial plateau, the deep MCL (medial collateral ligament), and the joint capsule, making it less mobile and more susceptible to tearing — accounting for approximately 75% of meniscal tears. The lateral meniscus is more circular, more mobile, and less commonly injured in isolation, but is frequently torn in conjunction with ACL rupture (lateral meniscal tears occur in 35–70% of acute ACL injuries).

Tear Pattern Classification

The ISAKOS (International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine) classification system is the standard for intraoperative meniscal tear description, using 5 parameters: tear type, depth, location (zone 1–3), rim width, and length.

• Vertical longitudinal tear: Runs parallel to the long axis of the meniscus along the periphery. Stable small tears may heal conservatively. Unstable large tears lead to the classic bucket-handle variant.
• Bucket-handle tear: A displaced vertical longitudinal tear where the inner fragment displaces into the intercondylar notch, causing a mechanical block to full extension (the 'locked knee' — inability to fully extend is pathognomonic). Acute locked knees with a bucket-handle tear require urgent arthroscopic surgery within days.
• Horizontal cleavage tear: Splits the meniscus into superior and inferior leaflets, parallel to the tibial plateau. Common in degenerative menisci (middle-aged patients); often associated with parameniscal cysts (Baker's cyst communicating with a posterior horn horizontal tear is a classic combination).
• Radial tear: Perpendicular to the long axis; disrupts the circumferential collagen fibres, abolishing hoop stress function. Even small radial tears significantly impair load distribution — equivalent biomechanically to partial meniscectomy. Root tears are a special category.
• Complex/degenerative tear: Multiple tear planes in a degenerate (myxoid) meniscus, commonly seen in patients over 45. Often associated with early osteoarthritis. Most responsive to conservative management.
• Root tears: Radial tears at the meniscal root insertion on the tibia — medial posterior root tears (MMPRT) and lateral posterior root tears (LMPRT). MMPRT causes acute medial compartment overload biomechanically equivalent to total medial meniscectomy and is strongly associated with progression to medial compartment OA. Must be recognised and repaired.

MRI Grading (Stoller Classification)

MRI signal within the meniscus is graded 0–3:

• Grade 0: Normal uniform low signal (black).
• Grade 1: Globular intrameniscal increased signal not reaching an articular surface — mucinous degeneration, no clinical tear.
• Grade 2: Linear increased signal not reaching an articular surface — intrameniscal degeneration.
• Grade 3: Increased signal unequivocally reaching at least one articular surface — true meniscal tear (sensitivity 92–96% for medial, 85–90% for lateral on 3T MRI).

Vascular Zones (Arnoczky and Warren)

Meniscal healing potential depends critically on blood supply. The peripheral 10–30% of the meniscus (red-red zone) receives blood supply from the perimeniscal capillary plexus and has good healing potential. The inner avascular zone (white-white zone) is reliant on synovial fluid nutrition and has minimal healing capacity. The intermediate zone (red-white) has variable healing potential.

Patient selection for surgical versus conservative management is the most critical clinical decision in meniscal tear management and has been significantly refined by recent RCT evidence:

Conservative Treatment Is Appropriate For

• Degenerative meniscal tears in patients over 40 with or without early-moderate OA — the METEOR trial (Katz et al., NEJM, 2013) and the FINN trial (Sihvonen et al., NEJM, 2013) both demonstrated that physiotherapy is equivalent to arthroscopic partial meniscectomy for degenerative meniscal tears at 12 months, with similar benefits maintained at 5-year follow-up in the FINN sham-surgery RCT (Sihvonen et al., NEJM Evidence, 2023).
• Asymptomatic or mildly symptomatic Grade 3 MRI changes in middle-aged patients — incidental MRI findings are common (prevalence of 36–60% in asymptomatic adults over 45).
• Partial thickness vertical tears less than 10 mm in length in the red-red zone — very high spontaneous healing rate.
• Acute tears in patients who are unwilling or unfit for surgery.

Surgery Is Indicated For

• Locked knee (bucket-handle tear with displaced fragment causing extension block) — urgent arthroscopy within 72 hours to weeks.
• Symptomatic meniscal tears in young, active patients (under 35–40) who have failed 3 months of structured physiotherapy — repair is preferred over resection to preserve meniscal function.
• Acute meniscal tears in the vascular zone in young athletes — highly amenable to repair with good healing rates.
• Meniscal root tears (MMPRT) — pull-through root repair is strongly recommended in active patients under 60 without severe OA (Kellgren-Lawrence Grade 0–2), as untreated root tears progress to rapid medial compartment OA.
• Tears associated with concurrent ACL reconstruction — concomitant meniscal repair at the time of ACL reconstruction has excellent healing rates (70–90%) because of the haemarthrosis and growth factor milieu created by the reconstruction tunnel.

1. PRICE — Immediate First Aid

Initial management of an acute knee injury follows the PRICE protocol: Protection (avoid weight-bearing, use crutches), Rest, Ice (cryotherapy 20 min on/off for 48–72 hours, ice wrapped to prevent frostbite), Compression (elastic bandage), Elevation (above heart level to reduce oedema). Oral NSAIDs (ibuprofen, naproxen) reduce swelling and pain in the first 48 hours. Aspiration of a tense haemarthrosis (blood in joint) by a clinician relieves pain and allows examination.

2. Physiotherapy (Conservative Management)

A structured physiotherapy programme is first-line for degenerative meniscal tears and a co-treatment for surgical cases:

• Phase 1 (weeks 0–4): Pain and swelling control; isometric quadriceps, heel slides, straight leg raises; neuromuscular electrical stimulation (NMES) to prevent quadriceps atrophy.
• Phase 2 (weeks 4–8): Closed-chain exercises (mini-squats, step-ups, leg press); cycling; aquatic therapy; hip strengthening (gluteus medius).
• Phase 3 (weeks 8–12): Sport-specific exercise, proprioception training, plyometrics, running programme. Return to recreational sport typically at 3 months for conservative management of degenerative tears.

3. Arthroscopic Partial Meniscectomy (APM)

APM involves arthroscopic removal of the unstable torn fragment, leaving the stable meniscal rim. It is performed through 2–3 small portals (5 mm) under general or regional anaesthesia; day-case procedure lasting 30–45 minutes. The goal is to remove the minimum tissue required to restore a stable, smooth meniscal margin, preserving as much functioning meniscal rim as possible. Radial resection (perpendicular cuts) must be avoided as they destroy hoop stresses even from a small resection. Despite the METEOR and FINN trial evidence, APM remains appropriate for younger patients with symptomatic traumatic tears that fail physiotherapy, and for locked knees. Post-APM recovery: full weight-bearing immediately; return to light sport at 4–6 weeks; full sport 2–3 months.

4. Arthroscopic Meniscal Repair

Repair is strongly preferred over resection for appropriate tear patterns in younger patients (under 40) in the vascular zone. Three main techniques:

Inside-out repair: The gold standard for tears of the body and posterior horn. Long, flexible needles with sutures are passed from inside the joint through the meniscus and capsule to the outside skin, where the sutures are tied over the capsule via a small posterior incision. Allows precise placement of vertical mattress sutures (strongest repair configuration). Risk: injury to the popliteal vessels and peroneal nerve from needle passage — requires careful posterior portal technique.

Outside-in repair: Spinal needles are passed from outside-in under arthroscopic vision to retrieve suture loops. Best for anterior horn and mid-body tears where inside-out access is limited. Lower neurovascular risk than inside-out.

All-inside repair: Self-cinching suture anchors (e.g., FasT-Fix 360, Omnispan, CrossFix) inserted entirely arthroscopically without posterior skin incision. Most widely used technique for posterior horn tears in current practice — faster, no posterior dissection risk, but suture anchor breakage and stiffness rates are slightly higher than inside-out in biomechanical studies. Healing rates for all-inside comparable to inside-out for posterior horn tears: 70–90% at 2 years (based on second-look arthroscopy or MRI criteria).

Post-repair rehabilitation: 6 weeks of partial weight-bearing and restricted flexion (less than 90 degrees); full weight-bearing at 6 weeks; quadriceps strengthening; no contact sport until 6 months; return to full sport 6–9 months.

5. Meniscal Root Repair (Pull-Through Technique)

For medial or lateral posterior root tears, a transosseous pull-through repair is performed: sutures are placed in the root tissue using a suture lasso or penetrating suture hook; a bone tunnel is drilled from the tibia at the anatomical root insertion to the anteromedial tibial surface; sutures are passed through the tunnel and tied over a cortical button or bone bridge. This technique restores the biomechanical function of the root — contact area and peak contact pressure normalise post-repair (biomechanical cadaveric studies). Clinical outcomes: reduced rate of progression to OA, improved pain and function scores at 2-year follow-up versus conservative management (Moon et al., Am J Sports Med, 2016).

6. Meniscal Allograft Transplantation (MAT)

Indicated for young patients (under 50) who have undergone prior subtotal or total meniscectomy, have significant knee pain related to the meniscus-deficient compartment, and do not have advanced articular cartilage loss (Kellgren-Lawrence Grade 0–2 or ICRS Grade 0–2 on the tibial plateau). A cryopreserved or fresh-frozen donor meniscal allograft (size-matched by MRI and X-ray measurement) is implanted arthroscopically or via mini-open technique, with bone plug fixation of the anterior and posterior horns into tibial tunnels. MAT reduces pain and improves function in appropriately selected patients, with 10-year survivorship of 70–75% (Verdonk et al., Am J Sports Med). It is not a cure for established OA; patients must have largely preserved articular cartilage to benefit.

Outcomes depend critically on tear type, patient age, and treatment choice:

• Meniscal repair healing rates: For acute vertical longitudinal tears in the vascular zone repaired in young patients (under 35): healing rates of 85–95% on second-look arthroscopy at 1 year. For complex or chronic tears in the white zone: healing rates drop to 60–70%. Concurrent ACL reconstruction significantly improves meniscal repair healing due to the biological environment of tunnel bleeding and growth factors.
• APM short-term outcomes: 80–90% of patients report significant symptom improvement at 6 months post-APM. However, long-term studies (Lohmander et al., Ann Rheum Dis, 2007) show progressive medial compartment narrowing and higher rates of OA requiring knee replacement — proportional to the amount of tissue resected.
• Conservative vs APM (degenerative tears): The FINN 5-year sham surgery RCT (Sihvonen 2023, NEJM Evidence) confirmed that at 5 years, physiotherapy alone produced equivalent outcomes to arthroscopic surgery for degenerative meniscal tears — supporting conservative management as the definitive evidence-based first-line approach.
• Root repair: Transosseous pull-through root repair halts the rate of medial compartment narrowing compared with non-operative management. At 5-year follow-up, KOOS and IKDC scores are significantly better in repaired versus conservatively managed root tears (Chung et al., Am J Sports Med, 2020).
• MAT: Appropriate MAT candidates report 70–80% good-to-excellent results at 10 years; MAT delays (but does not prevent) progression to knee replacement. Re-operation rate is approximately 10–15% at 10 years.

Specific risks depend on procedure chosen:

Conservative Management

• Failure to improve with physiotherapy — approximately 20–30% of patients with symptomatic degenerative tears eventually proceed to surgery.
• Progression to osteoarthritis — not prevented by conservative management, though evidence does not show APM prevents OA either.
• Muscle atrophy and chronic weakness — without compliance with physiotherapy programme.

Arthroscopic Partial Meniscectomy

• Infection (septic arthritis) — 0.1–0.4%; serious but rare. Presents with fever, hot swollen joint post-arthroscopy; requires urgent wash-out.
• DVT/PE — incidence 0.5–1%; prophylaxis with aspirin or LMWH in higher-risk patients.
• Haemarthrosis — blood in joint post-surgery requiring aspiration.
• Long-term: accelerated medial or lateral compartment OA — strongly correlated with volume of meniscal tissue removed.

Meniscal Repair

• Repair failure (re-tear) — occurs in 10–25% within 2 years; requires repeat arthroscopy for either re-repair or conversion to APM.
• Neurovascular injury (inside-out repair) — popliteal artery (rare), peroneal nerve injury (rare but devastating if missed); prevented by careful posterior capsulotomy technique.
• Stiffness/arthrofibrosis — if weight-bearing or motion restrictions not followed postoperatively; early mobilisation protocols have reduced this significantly.
• Infection — same rate as APM (0.1–0.4%).

Meniscal Root Repair

• Hardware complications — cortical button pull-through if tibial bone quality is poor.
• Failure to heal — particularly in older patients or poor vascular zones.

Meniscal Allograft Transplantation

• Allograft extrusion — the transplanted meniscus may extrude beyond the tibial rim (seen on MRI), reducing its protective effect.
• Allograft failure/re-tear — 10–15% at 10 years requiring removal.
• Disease transmission from donor tissue — extremely rare with modern screening and irradiation processing (risk estimated less than 1:1,000,000 for major viruses).
• Technical failure of bone plug fixation — rare with modern surgical technique.

Structured rehabilitation is essential regardless of treatment approach:

Post-Partial Meniscectomy

Full weight-bearing is permitted immediately using crutches as needed for comfort. Physiotherapy begins within 1–2 days: quadriceps activation, range of motion, and proprioception. Most patients return to desk work within 1–2 weeks, light recreational activity at 4–6 weeks, and full sport at 2–3 months. MRI is not routinely required post-APM unless symptoms persist or worsen.

Post-Meniscal Repair (Inside-Out/Outside-In/All-Inside)

Rehabilitation is strictly phased to protect the healing repair:

• Phase 1 (weeks 0–6): Partial weight-bearing with crutches and a hinged knee brace locked at 0–90 degrees. Quadriceps isometrics, straight-leg raises, ankle pumps. No active hamstring exercises (hamstring contraction pulls posterior horn inferiorly under load).
• Phase 2 (weeks 6–12): Progression to full weight-bearing, cycling, closed-chain exercises. Brace discontinued. Pool running and aquatic therapy.
• Phase 3 (weeks 12–24): Jogging programme, lateral agility, plyometrics.
• Return to sport (months 6–9): Based on objective criteria — symmetrical strength (quadriceps and hamstrings LSI greater than 90%), functional hop test symmetry, sport-specific skill assessment — not time alone. Younger athletes and those repaired with ACL reconstruction may return at the earlier end of this range.

Post-Root Repair

Similar to meniscal repair rehabilitation. Strict non-weight-bearing for 6 weeks is critical to protect the tenuous root fixation during early healing. Full return to sport deferred to 9–12 months in most protocols. Annual MRI surveillance to assess healing and cartilage status is recommended.

Post-MAT

Most restrictive rehabilitation — protected weight-bearing for 8–12 weeks; full return to low-impact activity at 6 months; impact and pivoting sports at 12 months if clinically appropriate. High-impact sport (football, basketball, martial arts) is discouraged long-term to protect the allograft.

Return-to-Sport Criteria

The most widely adopted criteria include: VAS pain score less than 2 at rest and activity, absence of effusion, quadriceps limb symmetry index (LSI) greater than or equal to 90% on isokinetic dynamometry, single-leg hop test LSI greater than or equal to 90%, and satisfactory sport-specific movement screening. Psychological readiness (ACL-RSI scale or equivalent) is increasingly incorporated into return-to-sport decisions.

Meniscal tear treatment costs vary significantly by country, facility, and procedure:

Conservative Management (Physiotherapy)

A structured 12-week physiotherapy programme costs: USD 600–2,400 in the US (20–40 sessions at USD 30–60/session under insurance co-pay; uninsured may pay USD 80–200/session). GBP 500–1,500 private in the UK; INR 10,000–30,000 in India. NHS physiotherapy is free but wait times may be 4–12 weeks.

MRI Knee

USD 300–1,200 in the US (with insurance); USD 80–200 in India; GBP 200–500 private UK; AUD 150–350 in Australia (Medicare rebate applies).

Arthroscopic Partial Meniscectomy (Day Case)

USD 8,000–25,000 in the US (facility + surgeon + anaesthesia, without insurance); GBP 3,000–8,000 private UK; USD 1,500–5,000 in India and Thailand at JCI/NABH-accredited hospitals; USD 3,000–8,000 in Turkey and Eastern Europe. NHS coverage in the UK is being increasingly restricted for degenerative tears following the FINN trial, with physiotherapy mandated first.

Meniscal Repair

USD 12,000–35,000 in the US (more complex than APM, additional implant costs for all-inside devices); USD 2,500–7,000 in India; GBP 5,000–12,000 private UK. Implant cost (all-inside anchors) adds USD 500–1,500 per anchor to the surgical cost.

Meniscal Allograft Transplantation

USD 25,000–60,000 in the US (allograft procurement adds USD 5,000–10,000); USD 8,000–18,000 in India and Thailand; GBP 10,000–20,000 private UK. Allograft availability is a limiting factor in many countries outside North America and Europe.

Several non-surgical and adjunct biological approaches are used as primary treatment or to support healing:

• Intra-articular corticosteroid injection: Triamcinolone acetonide or methylprednisolone reduces acute synovitis and pain in degenerative meniscal tears. Benefit is moderate and typically lasts 4–8 weeks. Not disease-modifying; may transiently worsen articular cartilage health at high doses. Useful as a bridging treatment before physiotherapy or surgery.
• Intra-articular hyaluronic acid (viscosupplementation): Restores synovial fluid viscosity and has mild anti-inflammatory effects. Meta-analyses show modest benefit over placebo in knee OA with associated meniscal changes; evidence is weaker for isolated meniscal tear. Typically given as a series of 3–5 weekly injections.
• Platelet-rich plasma (PRP): Autologous concentration of growth factors (PDGF, TGF-beta, IGF-1, VEGF) from centrifuged blood. Intra-articular PRP injection shows benefit in knee OA and is being investigated as an adjunct to meniscal repair to enhance healing in avascular zones. Not yet standard of care — a 2023 Cochrane review found moderate-quality evidence for PRP in knee OA but insufficient evidence specifically for meniscal tear. PRP injection at the repair site during arthroscopic suturing is used by some surgeons for avascular zone tears.
• Stem cell therapy (MSC injection): Bone marrow concentrate or adipose-derived mesenchymal stem cells injected intra-articularly or at the repair site have shown promising results in early clinical trials for meniscal and cartilage regeneration. Regulatory status varies by country; most applications remain investigational outside of trials.
• Unloading knee brace (osteoarthritis offloading): A valgus-producing unloader brace reduces medial compartment loading by approximately 13% — useful for medial compartment-predominant OA and meniscus-deficient knees. Reduces pain and improves function in observational studies but with poor long-term compliance due to bulkiness.
• Weight management and activity modification: Each 1 kg of body weight reduction decreases the knee joint reaction force by approximately 4 kg during ambulation. For overweight patients with degenerative meniscal tears, weight loss is among the most cost-effective interventions — reducing symptoms, slowing OA progression, and improving surgical outcomes if surgery is eventually needed.
• High tibial osteotomy (HTO): In patients with varus malalignment (bow-legged) combined with medial meniscal deficiency or OA, an opening wedge HTO realigns the mechanical axis to shift load from the medial to the lateral compartment. May be combined with meniscal root repair or MAT in carefully selected younger patients to optimise unloading and promote healing.