Double-Layered Lateral Meniscus Mimicking Locking of Lateral Meniscus: A Case Report
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Takashi Katsuo1,2, Yasushi Takata1, Naoki Takemoto1
1Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan.
Introduction:
Double-layered lateral meniscus is an extremely rare anomaly, often presenting with symptoms similar to those of meniscal tears or locking. Characteristic magnetic resonance imaging (MRI) findings are not well established, and definitive diagnosis typically requires arthroscopy.
Case Report:
A 47-year-old male presented with left knee pain following martial arts training. Locking of the lateral meniscus was suspected by MRI; however, arthroscopy revealed a double-layered lateral meniscus. The accessory meniscus was resected and post-operative outcomes were uneventful.
Conclusion:
MRI may serve as an adjunctive tool in the diagnosis of a double-layered lateral meniscus. Resection of the accessory meniscal layer can lead to favorable clinical outcomes.