Ligamentous injuries to the knee account 25 to 40% of all knee injuries.

The understanding of the physiology and biomechanics has taught us that the healing response of the intrarticular ligaments is different from the extrarticular ones, these differences have been attributed to local environment, sources of nutrition, the functions of the ligament or intrinsic mechanical properties.

The medial collateral ligament (MCL) follows the same phases as any other soft tissue:

• I: acute inflammation (firsts 72h)
  
  
• II: repair and regeneration (6 weeks)
  
  
• III: remodeling or maturation (12 months)
  
  
  

Anatomy
Biomechanics
Mechanism of Injury
Associated Injuries
Classification
Diagnosis
Investigations
Treatment
References