Avascular Necrosis of the Tarsal Navicular
Aka: Avascular Necrosis of the Tarsal Navicular, Tarsal Navicular AVN, Kohler's Disease

  1. Epidemiology
    1. Onset at age 5 years
  2. Pathophysiology
    1. Avascular necrosis of tarsal navicular
  3. Symptoms
    1. Presents with Painful limp
  4. Signs
    1. Local pain, tenderness, swelling over tarsal navicular
  5. Radiology: Foot XRay
    1. Flattening, sclerosis, irregularity of tarsal navicular
  6. Management
    1. Protect from excessive trauma
    2. Short walking cast for 7-8 weeks
  7. Prognosis
    1. Spontaneous recovery by rule
    2. Complete Navicular re-ossification in 2-3 years

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