Femoral anteversion is an internal rotation of the femur that occurs within the acetabulum. This results in the knees and feet being turn inward (pigeon-toed appearance)
Etiology of femoral anteversion
When the child is first learning how to walk, femoral anteversion can create an intoeing appearance. As the knees and feet turn in, the legs look like they are bowed.
Diagnosing Femoral Anteversion
The Hip Rotation Test is used in the differential diagnosis.
The angle formed between the superimposed longitudinal axis of the head, neck, and greater trochanter of the femur proximally and the transverse axisof the femoral condyles distally. This angle represents the structural twist that occurs in femur.
Approximately 12 degrees in adults, but is considerably greater in infants.
(1) Femoral Anteversion (Positional Deformity)
Hertling, D., & Kessler, R. M. (1996). Management of common musculoskeletal disorders: Physical therapy principles and methods. (3rd ed.). Philadelphia: J.B. Lippincott.
Rothbart BA (1972) Clinical treatise on transverse plane dysplasias of the femur and tibia. J Am Podiatirc Med Assoc 62:1-14.
Adducted (Pigeon-Toed) Gait
Structural and Positional Variances that Occur in the Femur
(1) Femoral Antetorsion (Structural Deformity)
Hip Rotation Test
Antetorsion angular orientation of the neck of the femur to a line that connects the femoral condyles (Rothbart, 1972; Hertling & Kessler, 1996, Fig 12-3, p. 286). As such, it describes a bony or structural torsion or twisting of the femoral shaft.
Intoeing secondary to Antetorsion (Internal Femoral Torsion)
Computing the Antetorsion Value