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Proximal femoral focal deficiency: a 50-year experience
Insights
Measurements can predict growth and stability in patients with proximal femoral focal deficiency (PFFD). Early prediction within two years is possible for unilateral cases, aiding treatment planning.
Area of Science:
- Orthopedics
- Pediatric Orthopedics
- Developmental Biology
Background:
- Proximal femoral focal deficiency (PFFD) is a congenital condition affecting limb development.
- Accurate prediction of growth and stability is crucial for managing PFFD patients.
- Early identification of prognostic indicators aids in timely intervention and management strategies.
Purpose of the Study:
- To identify key measurements for predicting ultimate growth and pelvo-femoral stability in PFFD patients.
- To establish correlations between PFFD classification and specific developmental indices.
- To determine factors influencing functional outcomes in both unilateral and bilateral PFFD.
Main Methods:
- Retrospective analysis of case histories from 91 patients with PFFD.
- Correlation of PFFD classification with measurements like femoral inhibition percentage, acetabular index, shelf index, and acetabular dysplasia.
- Evaluation of factors affecting functional outcomes at maturity, including leg-length differential and associated anomalies.
Main Results:
- Specific measurements allow early prediction of growth and pelvo-femoral stability in PFFD.
- For unilateral PFFD, classification correlates with femoral inhibition, acetabular index, shelf index, and dysplasia within the first two years.
- A constant percentage of femoral inhibition was observed in both unilateral and bilateral PFFD cases.
Conclusions:
- Early prediction of PFFD outcomes is feasible using identified measurements.
- Leg-length differential, foot position, and associated anomalies are primary determinants of functional outcome in bilateral PFFD.
- Understanding these factors aids in optimizing management and improving functional prognosis for PFFD patients.
Abstract:
The case histories of 91 patients (54 male, 37 female) with proximal femoral focal deficiency identified measurements which allow the physician to predict ultimate growth and pelvo-femoral stability early in the patient's life. For unilateral patients, the classification correlated with percentage of femoral inhibition, acetabular index, shelf index and acetabular dysplasia, enabling prediction to be made within the first two years of life. A constant percentage of femoral inhibition was confirmed in both unilateral and bilateral patients, and the effects of classification and associated anomalies were determined. Bilateral proximal femoral focal deficiency occurred twice as frequently among males, and function at maturity was primarily dependent upon leg-length differential, foot position and associated anomalies, and secondarily upon absolute leg-length and pelvo-femoral stability.