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Femoral Torsion

  • angular difference between the femoral neck axis and the transcondylar axis of the knee
  • birth averages 40 degrees of antervesion, by 8y/o averages the adult value of 15 degrees
  • increased femoral anteversion is most common cause of in-toeing in early childhood

Femoral Torsion Clinical Evaluation

  • characteristically sit in the W position and run with an eggbeater-type motion due to IR of thighs during swing phase
  • IR is increased, ER is decreased

Femoral Torsion Treatment

  • generally no treatment necessary
  • OR considered for >8y/o with marked cosmetic or functional deformity, anterversion >50 and IR >80 degrees.  Proximal or distal femoral osteotomy


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