Chondroblastoma - femoral head

This was a 20-years old lady with a well-defined osteolytic lesion in the left femoral head (Fig. 1). Just as with the earlier examples in the tibia and humerus, this was a characteristic epiphyseal lesion. An MRI was performed, which showed a speckled appearance on the STIR (Fig. 2) and T2W (Fig. 3) images with intense enhancement and reactive synovial enhancement as well (Fig. 5).

In countries where tuberculosis is endemic, this may be considered as a differential diagnosis in the event of a less well-defined zone of transition and the presence of a significant amount of soft tissue or abscess formation.