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. 2016 Apr 5;17:147. doi: 10.1186/s12891-016-1004-0

Fig. 1.

Fig. 1

(a) A boy at the age of 12 years at first presentation. Anteroposterior radiographs showing a lytic lesion of the right distal femur representing a stage A lesion. (b) 2 years later the lesion was polycyclic in shape with clearly sclerotic borders (stage B). (c) At the age of 15 years there was evidence of ossification beginning at the diaphysis (stage c)