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Medial Collateral Ligament (MCL) Tear

The most common knee ligament injury, usually treated non-operatively with a structured rehabilitation program.

Written by: Saygı Hospital Health Guide Editorial Board
Published:

This content is for general information; please consult your physician for diagnosis and treatment.

References (5)

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What is Medial Collateral Ligament (MCL) Tear?

The medial collateral ligament is the primary restraint to valgus stress at the knee. It is composed of superficial and deep components plus the posterior oblique ligament. Injury most often occurs from a direct lateral blow (contact sports), a non-contact pivoting injury, or a fall with valgus force.

MCL tears are graded I (sprain, no instability), II (partial tear with mild instability), and III (complete tear with significant instability). Combined injuries with anterior cruciate ligament, posterior cruciate ligament, or medial meniscus must be excluded.

Diagnosis combines history, valgus stress testing at 0° and 30°, and MRI when significant injury or combined ligament/meniscus injury is suspected. Stress radiographs may help quantify instability.

Symptoms

Pain on the medial side of the knee after valgus stress
Swelling, ecchymosis along the medial joint line
Tenderness at the femoral or tibial MCL attachment
Pain or laxity with valgus stress test
Sensation of instability or giving way (high-grade tears)
Difficulty cutting, pivoting, or descending stairs

Risk Factors

Contact sports: football, soccer, ice hockey, rugby, wrestling
Skiing (especially during a fall with the ski tip caught)
Non-contact valgus pivot in a cleated shoe
Previous knee ligament injury
Genu valgum or weak hip abductors
Inadequate warm-up, fatigue, female sex (slight increased risk)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Inability to bear weight or marked instability after a knee twist
  • Persistent medial-knee pain or instability beyond 1–2 weeks
  • Combined symptoms suggesting ACL or meniscus injury (locking, giving way, hemarthrosis)
  • Athletes preparing for return to sport with persistent valgus laxity

Treatment Methods

01
Most isolated MCL tears (Grade I–III) heal with conservative therapy
02
Acute phase: rest, ice, compression, elevation, NSAIDs
03
Hinged knee brace (allowing flexion-extension) for 2–6 weeks based on grade
04
Early progressive rehabilitation: range of motion, quadriceps activation, hip and core strengthening, neuromuscular control
05
Sport-specific progression including agility, plyometrics, and cutting drills before return to sport
06
Surgery considered for: persistent valgus laxity after 6–12 weeks of rehabilitation, distal tibial-sided avulsions, multi-ligament injuries, or significant rotational instability
07
Combined ACL/MCL injuries: ACL reconstruction with delayed or staged MCL repair/reconstruction
08
Average return to sport: 1–3 weeks for grade I, 3–6 weeks for grade II, 6–12 weeks for grade III isolated injuries

Which Department to Visit?

You can visit our Ortopedi ve Travmatoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.