Clinics in diagnostic imaging (69). Bilateral developmental dysplasia of the hip.

Developmental dysplasia of the hip (DDH) is a condition encompassing a spectrum of abnormality. The ultrasonography features of DDH in a male infant is illustrated. Follow-up after treatment with a Pavlik harness shows resolution of the DDH. In the neonatal period, ultrasonography (US) is the modality of choice used to evaluate babies with suspected developmental dysplasia of the hip. The unossified cartilaginous femoral head and much of the acetabulum can be visualised on US. When the femoral head begins to ossify, pelvic radiographs can be used to follow-up patients with developmental dysplasia of the hips.