Idiopathic genu varum and genu valgum are common problems in pediatric
orthopedic practice. Standardized evaluation is essential to compare
the deformity with age specific normal ranges. Secondary deformities a
re infrequent, often unilateral, and progressive with growth. Epiphyse
al stapling at adolescence is required only in severe deformities. Pat
ient Selection for this procedure is difficult because of uncertaintie
s regarding accurate bone age determination and prediction of final po
ststapling outcome. Closely spaced evaluations between 10 and 13 years
of age are helpful for determining the optimal time for stapling.