- Discussion:
-
bilateral angular deformity: common and is most often physiologic;
- normal knee alignment progresses from 10-15 deg of varus at birth to maximal valgus
angulation of 10-15 deg at age of 3-3.5 yrs;
- neutral alignment:
- neutral femoral-tibial alignment occurs at 12-14 months old;
- Greene: neutral femoral-tibial alignment at 14 months old;
-
unilateral genu valgum: often occurs from pathological conditions;
-
fibrous dysplasia
-
Ollier's disease
- dyschondrosteosis
-
neurofibromatosis
- physeal injury
- idiopathic fibrous tether;
- Radiographs:
- physiologic genu valgum, or knock knees, develops next, w/ maximal deformity occurring at 3 years of age;
- gradual correction to ultimate alignment of slight genu valgum occurs by 9 years of age in the
great majority of patients;
- references:
-
Physiological bowing and tibia vara. The metaphyseal-diaphyseal angle in the measurement of bowleg deformities.
Normal limits of knee angle in white children--genu varum and genu valgum. ³
Use of the Metaphyseal-Diaphyseal Angle in the Evaluation of Bowed Legs.
Progressive genu valgum secondary to a fibrous tether at the distal aspect of the femur. A case report.
S Amillio MD et al.
JBJS. Vol 80-A. No 3. March 1998. p 424.
Genu varus and valgus in children.
CE Shopfner and CG Coin.
Radiology. Vol 92. 1969. p 723-732.
