Acute patellar dislocation with multiple ligament injuries after knee dislocation and single session reconstruction.

Area of Science:

• Orthopaedic Surgery
• Sports Medicine
• Traumatology

Background:

• Knee dislocation is a rare but severe orthopaedic injury, often involving multiple ligamentous structures.
• Concurrent injuries to the anterior cruciate ligament, medial collateral ligament (MCL), medial patellofemoral ligament (MPFL), and meniscus complicate knee dislocation management.

Observation:

• A 41-year-old male presented with right knee dislocation and associated anterior cruciate ligament, MCL, MPFL ruptures, and a lateral meniscal tear.
• The patient underwent simultaneous single-bundle anatomic reconstruction, MCL reconstruction, MPFL reconstruction, and meniscus repair.

Findings:

• At 12-month follow-up, the patient achieved 160° knee flexion and 10° extension.
• The Lysholm knee score was 90, indicating significant functional recovery.

Implications:

• Valgus instability in knee dislocations warrants thorough evaluation for both MCL and MPFL injuries due to their anatomical proximity.
• Prompt and comprehensive surgical intervention can restore function in complex knee dislocations with multiple ligamentous and meniscal tears.