Abstract 
         
         A case of medial posttraumatic osteochondral lesion of the talus (OCLT) in a 25-year-old
            patient is reported. The potentially unclear symptomatology associated with this type
            of lesion is emphasized, and the imaging procedures as well as the classification
            systems based on these procedures are reviewed. The value of open surgery for curettage
            and drilling of a large zone of chondral defect with underlying osteosclerosis of
            the medial talar dome is evaluated. Compared to standard radiography and bone scan,
            magnetic resonance imaging (MRI) appears to correlate well with the intraoperative
            findings and is therefore useful as both a diagnostic and a prognostic tool. Our observations
            suggest that, even when a large zone of osteosclerosis underlies a medial chondral
            defect, drilling alone of this zone - after curettage of the detached cartilage -
            may be sufficient to lead to a good functional result. Bleeding out the healthy underlying
            cancellous bone through the drilling holes made in the sclerotic zone may be sufficient
            to restore part of the vitality and stability of the medial talar dome and is less
            invasive than osteochondral grafting.
         
         
         
            
Key words 
         
         
            talus - osteochondral lesion - ankle sprain
          
       
    
   
      
         References 
         
         
             
         
         xavier.crevoisier@hospvd.ch