Article

We evaluated the validity of the Robin and Graham classification system of
hip disease in cerebral palsy (CP) using three-dimensional computed tomography in
young people with CP. METHOD: A total of 91 hips in 91 consecutive children with
bilateral spastic CP (57 males, 34 females; nine classified at Gross Motor
Function Classification System level II, 42 at level III, 32 at level IV, and
eight at level V; mean age 5 y 2 mo, SD 11 mo; range 2-6 y) were investigated
retrospectively using anteroposterior plain radiographs and three-dimensional
computed tomography (3D-CT) of the hip. The migration percentage was calculated
on plain radiographs and all participants were classified into four groups
according to migration percentage: grade II, migration percentage >/= 10% but </=
15%, (four hips), grade III, migration percentage >15% but </= 30%, (20 hips);
grade IV, migration percentage >30% but <100%, (63 hips); and grade V, migration
percentage >/= 100%, (four hips). The lateral opening angle and the sagittal
inclination angle of the acetabulum, the neck-shaft angle, and the femoral
anteversion of the femur were measured on 3D-CT. RESULTS: The three-dimensional
quantitative evaluation indicated that there were significant differences in the
lateral opening angle and the neck-shaft angle between the four groups
(Kruskal-Wallis test, p </= 0.001). INTERPRETATION: This three-dimensional
evaluation supports the validation of the Robin and Graham classification system
for hip disease in 2- to 7-year-olds with CP.
CI - (c) The Authors. Developmental Medicine & Child Neurology (c) 2011 Mac Keith
Press.

Langue : ANGLAIS