Discoid Lateral Meniscus

Epidemiology

  • 1-5 % of the population

Classification

  1. Incomplete
  2. Complete
  3. Wriberg variant
    • Missing posterior & anterior coronary ligament
    • Displaces with flexion & reduces with extension
    • Snapping knee

Investigations

  • Xray
    • wide lateral joint
  • MRI

Treatment

  • If symptomatic only
  • Complete then reshape the meniscus
  • Wriberg – consider repair & balancing