DISCOID MENISCUS

29 Sep DISCOID MENISCUS

Introduction

• Incidence: 5 – 20%
• Failure of resorption of central portion of meniscus(in utero failure of apoptosis)
• Usually lateral meniscus but 25% bilateral

Watanabe Classification

• type 1 – complete
• Type 2 -incomplete
• Type 3 -wrisberg variant (lack of minisco-tibial ligament but present menisci-femoral ligament of wrisberg.

Presentation

• pain ,Cluck felt at 110 degree with flexion and 10 degree of extension and mechanical locking
• Symptomatic in adolescence.
• Mcmurray test will produce cluck due to translation of posterior horn of meniscus.

Imaging

• RADIOGRAPH

• AP and Lateral view xray
• Findings
  • joint space widening upto 11mm)
  • squaring of lateral condyl
  • cupping of lateral tibial plateau
  • hypoplastic lateral intercondylar spine
• MRI
  • Bow-tie sign
  • thick and flat meniscus
  • meniscal tear

Treatment

• Conservative
  • observation in case of asymptomatic tear
• surgical
  • partial meniscectomy and saucerization