1. Early recognition of femoro-pelvic instability in proximal femoral dysplasia is essential to rational management.2. Certain radiological signs helpful in identifying such patients within the first year are described.3. Early operation is recommended to prevent displacement of a pseudarthrosis and to encourage healing. Alternative methods are described for established defects.4. Radiological signs are described which indicate that healing without loss of femoro-pelvic stability will occur. Such patients may be managed expectantly.
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