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Double-layered lateral meniscus. A rare anatomical aberration
D Karataglis1, A Dramis, D J A Learmonth
1Royal Orthopaedic Hospital, Bristol Road South, Birmingham B31 2AP, UK. dkarataglis@yahoo.gr
The Knee
|July 4, 2006
Summary
This study details a rare case of a double-layered lateral meniscus, featuring an accessory hemimeniscus. This anatomical anomaly, previously undocumented outside Japan, was successfully treated with arthroscopic resection.
Area of Science:
- Orthopedic Surgery
- Human Anatomy
Background:
- The lateral meniscus is a crucial C-shaped fibrocartilaginous structure in the knee joint, contributing to load-bearing and stability.
- Anatomical variations of the meniscus are uncommon, with most reported cases of meniscal duplication originating from Japanese populations.
Observation:
- A unique case of a double-layered lateral meniscus was identified, characterized by an accessory proximal hemimeniscus.
- This accessory structure lay superior to the normal lateral meniscus, attached to the capsule, and was notably thinner and more mobile.
Findings:
- The accessory hemimeniscus was successfully resected arthroscopically, resolving the patient's condition.
- This represents the first reported instance of this specific lateral meniscus anatomical abnormality in a non-Japanese individual.
Implications:
- Highlights the importance of recognizing rare anatomical variations in knee surgery for accurate diagnosis and treatment.
- Expands the known geographical distribution of lateral meniscus duplication anomalies.
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