Orthopedics Book


Osteochondritis Dissecans of Talus

Aka: Osteochondritis Dissecans of Talus, Talar OCD, Talar Avascular Necrosis
  1. See Also
    1. Talar Dome Fracture
    2. Osteochondritis Dissecans of Talus
    3. Talus Fracture
    4. Talar Dome Fracture
    5. Lateral Talar Fracture
    6. Posterior Talar Fracture
    7. Foot Fracture
    8. Calcaneus Fracture
  2. Definitions
    1. Osteochondritis Dissecans of Talus (Talar OCD)
      1. Traumatic defect in articular surface of talus
      2. Small area necrotic bone formation (Usually medial)
  3. Epidemiology
    1. Adolescence or young adulthood
  4. Symptoms
    1. Persistent symptoms of "Ankle Sprain" that won't heal
    2. Gradual onset with distant history of ankle injury
    3. Painful limp
    4. Chronic swelling in ankle with activity
  5. Signs
    1. Examine ankle with foot in plantar flexion
    2. Point tenderness over articular surface of talus
    3. Restricted Ankle Range of Motion
  6. Radiology
    1. Ankle XRay
      1. Necrotic fragment at joint
    2. Bone scan
    3. Ankle MRI
  7. Management
    1. Nondisplaced fragment
      1. No weight bearing until lesion heals
      2. Cast immobilization often needed
    2. Persistent symptoms or fragment detachment
      1. Surgical removal of necrotic fragment

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