Thirteen children with posteromedial bowing of the tibia were followed
clinically and radiographically for a mean of four years from the time of
original diagnosis. At follow-up, the discrepancy in leg lengths as
determined by scanograms ranged from 1.9 to 5.6 centimeters, with a mean of
3.1 centimeters; usually there was progression of the discrepancy. Nine of
the thirteen children had a discrepancy of more than 2.5 centimeters. There
appeared to be a direct relationship between the degree of initial tibial
bowing and the severity of the subsequent leg-length discrepancy.