Minimal invasive medial patellofemoral ligament reconstruction using quadriceps tendon with de novo technique and arthroscopic guided: A case report.

Introduction: Medial Patellofemoral ligament (MPFL) reconstruction, the primary procedure for restoring patellar stability and preventing further dislocation, has seen numerous methods and grafts. However, a consensus on the technique and graft remains elusive. This study introduces a novel approach to MPFL reconstruction, utilizing a unique combination of minimal invasiveness, de novo method, and arthroscopic guidance to harvest a quadriceps tendon (QT) graft without the need for a harvesting tool.

Case Illustration: A 37-year-old female presented to the emergency room with the chief complaints of left knee pain and swelling following the third spontaneous dislocation of the patella. The patient had a few episodes of locking sensation and instability of the left knee while walking, especially while climbing stairs. A knee MRI revealed MPFL tear in the left knee. A modified minimal invasive MPFL reconstruction technique was performed. The IKDC, Lysholm, and Modified Cincinnati scores improved significantly from preoperatively 48.3 %, 49 %, and 51 % to 89.7 %, 90 %, and 95 % consecutively. No recurrent patellar dislocations or swelling were reported during follow-up.

Discussion: While quadriceps graft harvesting for MPFL reconstruction is typically highly invasive, using quadriceps tendons has consistently shown excellent outcomes. This study, however, takes it a step further by demonstrating that a minimally invasive procedure for harvesting quadriceps tendons, even without specialized instrumentation, can also yield excellent results.

Conclusion: MPFL reconstruction using superficial quadriceps tendon autograft can be achieved using a minimally invasive technique without the use of specialized instrumentation and has shown excellent knee functional improvement.