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Figure 8. (a) Lateral and (b) anteroposterior radiographs of distal humerus in a child. There is moth-eaten aggressive bone destruction with focal cortical disruption (arrow), and periosteal response in a single lamina. (c) Coronal T1 and (d) axial T2 fat-saturated MR images of the distal humerus. There is extensive medullary infiltration, cortical destruction, extraosseous mass (arrow) and oedema. Diagnosis: Unifocal Langerhans cell histiocytosis (eosinophilic granuloma). The imaging findings can be very similar to those of Ewing's sarcoma.
