Idiopathic Chondromalacia Patellae

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Topic updated on 03/01/13 10:20pm
Presentation
  • Characterized by idiopathic articular changes of the patella
    • this term is falling out of favor.
  • Associated conditions
    • miserable malalignment syndrome
      • a term coined for anatomic characteristics that lead to and increased Q angle and an exacerbation of patellofemoral dysplasia. They include
        • femoral anteversion
        • genu valgum
        • external tibial torsion / pronated feet
Presentation
  • Symptoms
    • pain with stair climbing
    • theatre sign (pain with sitting for long periods of time)
  • Physical exam
    • pain with compression of patella
Imaging
  • Radiographs
    • may see chondrosis on xray
Classification

Outerbridge classification of chondromalacia
Type I Softening
Type II Fissures
Type III Crabmeat changes  
Type IV Exposed subchondral bone

Treatment
  • Nonoperative
    • rest, rehab, and NSAIDS
      • indications
        • mainstay of treatment and should be done for a minimum of one year
      • technique
        • NSAIDS
        • activity modification
        • rehabilitation with emphasis on 
          • vastus medialis obiquus strengthening
          • closed chain short arc quadriceps exercises
  • Operative
    • patellar realignment surgery
      • indications
        • severe symptoms that have failed to improve with extensive physical therapy
      • techniques
        • Maquet (anterior tubercle elevation)
          • only elevate 1 cm or else risk of skin necrosis
        • Fulkerson (anterior-medialization)
          • indications (controversial)
            • increased Q angle
            • patellar instability
          • contraindications
            • superior medial arthrosis (scope before you perform the surgery)
            • skeletal immaturity

 

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