Accuracy And Difficulty of Preoperative Diagnosis for Mediopatellar Plica Syndrome

Background: There is no consensus on the optimal method for the definitive diagnosis of mediopatellar plica syndrome. Currently, the diagnosis is made based on the patient history and is supported by physical examination. In this study, we retrospectively examined the accuracy of pre-arthroscopic diagnosis. Result: Five knees (20%) were diagnosed with mediopatellar plica syndrome based on MRI before arthroscopic examination. The pre- arthroscopic diagnosis rate of mediopatellar plica syndrome was 18 knees (72%). Complete suprapatellar plica and mediopatellar plica were noted in 3 knees. Mediopatellar plica (type C) and patellofemoral disorder were observed bilaterally in one patient. Conclusion: Our results imply that collecting a more detailed patient history and conducting a thorough physical examination are both important in definitive diagnosis of mediopatellar plica syndrome. However, it should be noted that mediopatellar plica syndrome may accompany patellofemoral disorders.