2020 Volume 45 Issue 1 Pages 19-22
Introduction: We present two cases of arthroscopic partial meniscectomy with peripheral tear repair for symptomatic discoid lateral meniscus.
Case presentation: The first case involved a 9-year-old girl whose chief complaint was a clicking sensation. We diagnosed her condition as peripheral tear of the anterior horn of the discoid lateral meniscus, as magnetic resonance imaging (MRI) revealed a posterior and central shift of the lateral meniscus. Arthroscopic findings revealed a completely discoid lateral meniscus and a peripheral tear of the anterior horn. We repaired the peripheral tear after partial meniscectomy. The second case involved a 16-year-old boy whose chief complaint was the feeling of knee dislocation. We made a diagnosis of peripheral tear of the posterior horn of the discoid lateral meniscus, as MRI revealed a wide space between the posterior horn and posterior capsule and the absence of a popliteomeniscal fascicle. Arthroscopic findings revealed a completely discoid lateral meniscus and a peripheral tear of the posterior horn. We repaired the peripheral tear after partial meniscectomy.
Discussion: Preservation of the lateral meniscus is imperative, and characteristic MRI findings are necessary to locate the meniscal tear.
Conclusion: We report positive outcomes of arthroscopic partial meniscectomy with peripheral tear repair for symptomatic discoid lateral meniscus. Characteristic preoperative MRI findings are necessary for diagnosis and proper treatment.
