Tibial Collateral Ligament Bursa

bursa ligamenti collateralis tibialis

The tibial collateral ligament bursa (medial knee bursa) lies between the deep medial collateral ligament (medial meniscotibial ligament) and the overlying superficial MCL, separating the two layers of the medial collateral ligament complex. It allows independent motion between the superficial and deep MCL during knee flexion as the two layers move at different rates. It may be distended in medial collateral ligament injury or medial knee inflammation.

Region: Knee

Clinical Relevance

Clinical Notes

The tibial collateral ligament bursa is relevant in medial knee surgery and in distinguishing medial structures during MCL repair. It is consistently present and provides the natural gliding plane between the superficial and deep MCL. In grade III MCL tears where the deep layer (coronary) is also torn, this bursal space collapses and the two layers cannot be independently identified. Corticosteroid injection between the MCL layers targets this bursa for medial knee pain from medial compartment stress and medial meniscal degeneration.

Pathology

Common Injuries & Conditions

Medial Knee Bursa Injection for Medial Compartment Pain

The tibial collateral ligament bursa between the superficial and deep MCL provides the target for ultrasound-guided medial knee injection in patients with medial compartment pain from MCL stress and degenerative medial meniscal changes; accurate placement between the two MCL layers avoids the medial joint space and delivers medication to the correct compartment.