Osteochondritis dissecans of the ankle

Dr Mostafa El-Feky and Dr Bruno Di Muzio et al.

Osteochondritis dissecans (OCD) of the ankle is the end result of the aseptic separation of an osteochondral fragment of the talar dome with the gradual fragmentation of the articular surface. See the main osteochondritis dissecans article for a general discussion on this condition, which mostly affects the knees. 

The definition of osteochondritis dissecans says that these lesions occur in an immature growing skeleton, however, the symptoms usually have their onset in the adulthood.

May be asymptomatic for a long period. A common complaint is an intermittent weight-bearing pain. When there is a loose body within the joint, symptoms may be more severe and include intense pain, swelling, instability during walking, and locking. 

See the main osteochondritis dissecans article for a general discussion on the pathology of this condition.

Radiographs are more sensitive if dedicated projections are obtained, such as dorsiflexion and plantarflexion AP of the ankle or with 15° of internal rotation. Osteochondritis dissecans is predominantly located in the superomedial corner of the talus:

  • subchondral halo outlining the osteochondral fragment
  • a focal concavity of the articular surface
  • an intra-articular bone fragment may be seen

It was first described in the ankle by M Kappis in 1922 1,4.

Article information

rID: 46927
Synonyms or Alternate Spellings:
  • Osteochondritis dissecans of ankle
  • OCD ankle

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Case 1
    Drag here to reorder.
  • Case 2
    Drag here to reorder.
  • Case 3
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.