CDH diagnosed at 2 to 12 months of age--treatment and results.

A treatment program for late-diagnosed CDH included skin traction, arthrography, tenotomy of adductor and psoas tendons, and immobilization of the hips in the "frog leg" position with a plaster cast for 8-12 weeks, followed by an abduction frame until the acetabular dysplasia normalized. Follow-up of 40 children with nonteratological CDH performed 2-12 years after diagnosis revealed 38 normal hips and 2 patients with coxa magna, one of whom had intermittent hip pain.