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Acetabular hypertrophy in Legg-Calvé-Perthes disease

D A Yngve, J M Roberts

    Journal of Pediatric Orthopedics
    |July 1, 1985
    PubMed

    Insights

    Children with Legg-Calvé-Perthes disease often show overgrowth of the acetabulum and femoral head. This joint enlargement, likely due to hyperemia, can indicate poor prognosis, especially with acetabular bicompartmentalization.

    Area of Science:

    • Orthopedics
    • Pediatric Radiology
    • Developmental Orthopedics

    Background:

    • Legg-Calvé-Perthes disease (LCPD) is a hip disorder affecting children.
    • Understanding radiographic changes is crucial for prognosis.

    Purpose of the Study:

    • To investigate radiographic measurements of the acetabulum and femoral head in children with unilateral LCPD.
    • To explore the relationship between overgrowth, hyperemia, and acetabular contour abnormalities.

    Main Methods:

    • Radiographic analysis of 65 children with unilateral LCPD.
    • Measurement of acetabular and femoral head dimensions.
    • Evaluation of acetabular contour for signs like bicompartmentalization.

    Main Results:

    • 61/65 children showed a larger acetabulum (mean 4.0 mm) on the affected side.
    • 60/65 children exhibited increased femoral head size (mean 6.8 mm).
    • Acetabular and femoral head overgrowth occurred early and in parallel, suggesting hyperemia as the cause.
    • 19/83 hips showed acetabular bicompartmentalization, linked to cartilage hypertrophy and femoral head lateralization.

    Conclusions:

    • Acetabular and femoral head overgrowth are common findings in LCPD, correlating with hyperemia.
    • Acetabular bicompartmentalization is an early sign associated with poor prognosis in LCPD.

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