MCL, LCL & PCL

Specialized Care for Knee Ligament Injuries to Restore Stability and Get You Moving Again

The ligaments of the knee play an important role in keeping the joint stable during walking, running, cutting, pivoting, and other movements. Injuries to the medial collateral ligament (MCL), lateral collateral ligament (LCL), and posterior cruciate ligament (PCL) can range from mild sprains to complete tears and may affect stability, mobility, and the ability to participate in sports or everyday activities.

The MCL supports the inside of the knee, while the LCL provides stability along the outside. The PCL, located inside the knee joint, helps control backward movement of the shin bone in relation to the thigh bone.

These injuries can occur during sports, falls, collisions, or other accidents. Some involve a single ligament, while more significant injuries may damage multiple ligaments or other structures within the knee.

At Orthopaedic Specialists of Austin, our sports medicine specialist evaluates MCL, LCL, and PCL injuries and develops an individualized treatment plan based on the ligament involved, severity of the injury, knee stability, activity level, and recovery goals. Treatment may range from bracing and physical therapy to surgical reconstruction for injuries that cause significant or persistent instability.

Knee ligament injuries do not always cause the same symptoms. Pain may be concentrated along the inside or outside of the knee, while some injuries particularly PCL tears may cause a deeper feeling of discomfort or instability.

Symptoms may include:

• Pain along the inside, outside, or back of the knee

• Swelling or tenderness

• Knee stiffness or reduced range of motion

• Difficulty bearing weight or walking normally

• A sensation that the knee may buckle or give way

• Pain with running, cutting, twisting, or changing direction

• Difficulty returning to sports or physical activity

• Bruising around the knee
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A knee injury that causes significant swelling, instability, difficulty bearing weight, or persistent pain should be evaluated. Ligament injuries can occur along with ACL tears, meniscus injuries, cartilage damage, fractures, or injuries to other structures of the knee.

Each ligament stabilizes the knee in a different way, and the mechanism of injury often provides clues about which structure may be affected.

MCL injuries involve the ligament along the inner side of the knee. They commonly occur when a force to the outside of the knee pushes it inward. MCL injuries are frequently seen in football, soccer, basketball, skiing, and other activities involving contact or sudden changes in direction.

LCL injuries affect the ligament on the outer side of the knee. A force that pushes the knee outward can stretch or tear the LCL. Although LCL injuries are less common than MCL injuries, they may occur with injuries to other stabilizing structures on the outside of the knee.

PCL injuries involve one of the major ligaments inside the knee. The PCL prevents the shin bone from moving too far backward relative to the thigh bone. Injuries may result from a force to the front of a bent knee, such as landing directly on the knee during sports or striking the knee against the dashboard in a motor vehicle accident. Hyperextension and twisting injuries can also damage the PCL.

Many isolated ligament injuries can be treated without surgery. Depending on the injury, treatment may include:

• Temporary activity modification

• Bracing to protect and stabilize the knee

• Physical therapy to improve strength, motion, balance, and stability

• Ice and compression to help manage early swelling

• Anti-inflammatory medications when appropriate

• Progressive strengthening and sport-specific rehabilitation

• A structured return to activity or competition
  
  

MCL injuries often heal successfully without surgery. Certain isolated PCL injuries may also respond well to rehabilitation and appropriate bracing.

LCL injuries require careful evaluation because significant tears can occur with damage to other structures along the outside of the knee.

Surgery may be recommended when an injury causes substantial instability, involves multiple knee ligaments, or does not respond adequately to nonsurgical care.

• Surgical treatment may be considered for:

• Complete ligament tears associated with persistent instability

• Significant LCL or PCL injuries

• Combined or multi-ligament knee injuries

• Injuries involving other structures that require surgical treatment

• Patients whose knee remains unstable despite rehabilitation

• Athletes or highly active patients whose injury prevents a safe return to their desired level of activity
  
  

Depending on the injury, surgery may involve ligament repair or reconstruction. Your physician will discuss the appropriate approach based on the structures involved and your individual needs.