Changes in radiographic findings of the left femur over the course of observation (age 2 weeks to 1 year). A. 2 weeks: antero-lateral bowing, widened and irregular metaphyses with flaring and medial beaking (black arrow), and thick, smooth periosteal reaction (white arrow). B. 3 months: improved bowing, resolved periosteal reaction and mild residual beaking of the medial upper femoral metaphysis. C. 1 year: Further improvement in lateral bowing, complete resolution of metaphyseal deformity.