Orthopedics Book

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Meniscus InjuryAka: Meniscus Tear, Meniscal Injury, Lateral Meniscal Tear, Medial Meniscal Tear

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  1. Epidemiology
    1. Most common knee injury
  2. Anatomy: Menisci
    1. Fibrocartilaginous C-shaped (semilunar) objects
      1. Medial meniscus (90%)
        1. Less mobile than lateral meniscus
      2. Lateral meniscus (10%)
    2. Cushion forces between femur and tibia
  3. Mechanism: Twisting injury
    1. Fixed tibial rotation with knee flexion or extension
  4. Associated injuries
    1. Anterior Cruciate Ligament Tear (33% of cases)
  5. Symptoms
    1. Twisting injury to knee while weight bearing
    2. Initial tearing, painful sensation felt
    3. Pain localized to affected meniscus
    4. Intermittent locking or buckling sensation
    5. Gradual onset of effusion following injury
    6. Provocative
      1. Stair climbing or stair descent
      2. Squatting
  6. Signs
    1. Joint effusion
    2. McMurray's Test positive
    3. Apley's Compression Test positive
    4. Apley's Distraction Test negative
    5. Bounce Test positive
  7. Radiology
    1. Knee XRay
  8. Management: Conservative
    1. RICE-M
    2. NSAIDs
    3. Crutch walking
    4. Quadriceps strengthening Exercises for 2-4 weeks
      1. Initially perform with knee extended
    5. Gentle knee range of motion Exercises after 2-3 days
      1. Consider Swimming
  9. Management: Surgery
    1. Irreducible locking
    2. Refractory meniscus symptoms despite above management
  10. Complications
    1. Knee Osteoarthritis
  11. References
    1. Mercier (1995) Practical Orthopedics, Mosby, p. 217-9
    2. Smith (1995) Am Fam Physician 51(4):799

Tear of meniscus of knee (C0238218)

ConceptsInjury or Poisoning (T037)
EnglishCartilage tear - knee, Knee - internal derange, MENISCAL TEAR, Tear - meniscus, Tear of cartilage of knee, Tear of meniscus of knee, Torn cartilage, Torn meniscus
Spanishdesgarro de cartilago de la rodilla, desgarro de menisco de la rodilla, desgarro meniscal
Parent ConceptsInjury of specialized joint structure (C0475087), Meniscus derangement NOS (C0559036)
SourcesCOSTAR, DXP, SCTSPA, SNOMEDCT
Derived from the NIH UMLS (Unified Medical Language System)



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