In my practice, I often see patients who say, “The pain is on the outer side of my knee, and it does not feel stable.” Sometimes that problem is a mild lateral knee sprain. But in more serious cases, the lateral collateral ligament, or LCL, is badly torn and the knee starts to open up abnormally on the outer side. When the ligament is too damaged to heal well or when the injury is part of a more complex pattern, LCL reconstruction may become an important treatment option. [1][2]
One important point I want Bangladeshi patients to understand is this: not every LCL injury needs surgery, and not every surgery on the lateral side of the knee is the same. Some patients improve with bracing and physiotherapy. Others have severe instability, combined ligament injury, or chronic giving-way symptoms that make reconstruction a more appropriate option. [1][2][3]
For patients in Dhaka and across Bangladesh, this type of injury may happen during football, cricket, road traffic accidents, falls, twisting injuries, or high-force trauma. The correct treatment depends on the grade of the tear, whether other structures are injured, and how stable the knee remains during daily activity. [1][2]
What the LCL does
The LCL is a strong cord-like ligament on the outer side of the knee. It connects the femur to the fibula and helps prevent the knee from bending outward too much under varus stress. It also contributes to control of posterolateral rotation. [2]
Why the LCL matters for stability
I usually explain to my patients that the LCL works like an important side restraint for the knee. It helps with:
- side-to-side stability
- control during turning
- confidence on uneven ground
- support when changing direction
- restraint of abnormal outward bending
The LCL often does not get injured alone. Because it is closely related to the posterolateral corner, ACL, and PCL, a severe LCL tear may be part of a larger instability problem. [2]
How LCL injuries happen
When I evaluate patients with lateral knee injuries, I ask carefully about the direction of force.
Common causes
- a blow to the inner side of the knee that pushes it outward
- twisting on a planted foot
- hyperextension trauma
- sports collisions
- road traffic accidents
- falls from height or awkward falls during activity
AAOS notes that blows to the inside of the knee that push the knee outward may injure the LCL. [1] In Bangladesh, I also see these injuries after motorcycle crashes, football tackles, and missteps on uneven roads or stairs.
Symptoms of an LCL tear
The symptoms depend on whether the injury is mild, partial, or complete.
Common symptoms
- pain on the outer side of the knee
- swelling
- tenderness along the lateral ligament
- a feeling that the knee may give way
- difficulty trusting the knee while walking or turning
- bruising after more severe trauma
Symptoms that suggest a more serious injury
- marked instability
- inability to bear weight
- numbness or tingling in the lower leg or foot
- weakness lifting the foot
- associated major swelling after trauma
In severe lateral-sided injuries, I pay close attention to possible common peroneal nerve involvement and to the possibility of a multiligament knee injury rather than an isolated LCL tear. [2][4]
Do all LCL tears need reconstruction?
No. Many do not.
Mild and moderate injuries
Grade 1 and some Grade 2 LCL injuries can often be treated without surgery, especially if the knee remains stable and there is no major associated injury. [2] Treatment may include:
- temporary bracing
- rest from aggravating activity
- swelling control
- physiotherapy
- gradual return to walking and sport
When surgery becomes more likely
Surgery is considered more seriously when there is:
- a Grade 3 complete tear
- significant side-to-side instability
- chronic instability after non-surgical care
- associated ACL, PCL, or posterolateral corner injury
- ligament avulsion from bone
- high-demand activity goals with an unstable knee
AAOS notes that isolated LCL injuries may sometimes be treated similarly to MCL sprains, but surgery may be recommended, especially if the ligament has pulled directly off the bone or if other structures are involved. [1]
What LCL reconstruction means
LCL reconstruction is a surgery in which the damaged ligament is restored using graft tissue rather than simply relying on the torn ligament to heal on its own.
Why reconstruction may be preferred over repair
This is an important question. Some patients hear the words “repair” and “reconstruction” and think they are interchangeable. They are not.
- Repair usually means reattaching or stitching the injured native tissue.
- Reconstruction means creating a new stabilizing ligament using graft tissue.
In chronic cases, poor tissue quality, major instability, or combined posterolateral injuries, reconstruction is often favored over simple repair. In the multiligament-injured knee literature, repair has shown higher failure rates than reconstruction for fibular collateral ligament and posterolateral corner injuries. [4]
I usually explain to my patients that reconstruction is often chosen when the knee needs a stronger, more reliable restoration of stability rather than just a limited reattachment.
When I consider LCL reconstruction
When I evaluate patients with this problem, I think carefully about function, instability, and associated injury patterns.
Common reasons to discuss reconstruction
- complete LCL rupture with obvious varus instability
- injury involving the posterolateral corner
- chronic outer-side knee looseness
- persistent giving way after rehabilitation
- combined ligament injury with ACL or PCL tear
- failure of prior non-surgical treatment
StatPearls notes that Grade 3 LCL tears, multiligament injuries, chronic instability, or failed conservative management are common situations where surgical intervention is considered. [2]
How I assess a patient before surgery
Before recommending reconstruction, I need to understand the full instability pattern of the knee.
Clinical evaluation
I ask about:
- how the injury happened
- whether the knee buckles during walking or turning
- whether there is difficulty on stairs or uneven ground
- whether the patient feels instability during sport
- whether there are nerve symptoms in the leg or foot
On physical examination, I assess:
- lateral joint tenderness
- varus laxity
- posterolateral instability signs
- range of motion
- swelling
- gait
- nerve function in the foot and ankle
