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Bilateral occurrence and morphologic analysis of complete discoid lateral meniscus
Jun Young Chung1, Jeong-Ho Roh2, Joon Ho Kim1
1Department of Orthopedic Surgery, Ajou University School of Medicine, Suwon, Korea.
Yonsei Medical Journal
|April 4, 2015
Summary
Most patients with a unilateral symptomatic complete discoid lateral meniscus (DLM) also have the condition in the other knee. Evaluation of the contralateral knee is recommended due to potential tears and symptoms.
Area of Science:
- Orthopedic Surgery
- Knee Joint Anatomy
- Diagnostic Imaging
Background:
- Discoid lateral meniscus (DLM) is a congenital anomaly.
- Complete DLM can be associated with knee pain and meniscal tears.
- Bilateral presentation of DLM is not fully understood.
Purpose of the Study:
- To investigate the bilateral incidence and morphology of complete discoid lateral meniscus (DLM).
- To analyze the relationship between DLM morphology, tears, and symptoms.
- To assess the contralateral knee in patients with unilateral symptomatic DLM.
Main Methods:
- Retrospective review of 38 patients with unilateral symptomatic or torn complete DLM.
- Diagnostic arthroscopy performed on both knees for all patients.
- Recording of DLM presence, shape, tear presence, and tear patterns.
Main Results:
- Bilateral complete DLM found in 89.5% of patients, with identical shapes in 84.2%.
- Cape-slab was the most common shape.
- Meniscus tears and symptoms occurred in the contralateral knee in 32.4% and 26.5% of cases, respectively, irrespective of DLM shape.
Conclusions:
- High incidence of bilateral complete DLM suggests a systemic condition.
- Contralateral knee evaluation is crucial for patients with unilateral symptomatic DLM.
- Early detection and management of contralateral DLM can prevent further complications.
