Fulltext

Femoroacetabular impingement: normal values of the quantitative morphometric parameters in asymptomatic hips

Lepage-Saucier, Marianne ; Thiéry, Cécile ; Larbi, Ahmed ; Lecouvet, Frédéric ; Vande Berg, Bruno ; Omoumi, Patrick

In: European Radiology, 2014, vol. 24, no. 7, p. 1707-1714

Aggiungi alla tua lista
    Titre
    • Femoroacetabular impingement: normal values of the quantitative morphometric parameters in asymptomatic hips
    Auteur
    • Lepage-Saucier, Marianne. Cliniques Universitaires Saint Luc - Université Catholique de Louvain, Woluwe-Saint-Lambert, Belgium
    • Thiéry, Cécile. Cliniques Universitaires Saint Luc - Université Catholique de Louvain, Woluwe-Saint-Lambert, Belgium
    • Larbi, Ahmed. Cliniques Universitaires Saint Luc - Université Catholique de Louvain, Woluwe-Saint-Lambert, Belgium
    • Lecouvet, Frédéric. Cliniques Universitaires Saint Luc - Université Catholique de Louvain, Woluwe-Saint-Lambert, Belgium
    • Vande Berg, Bruno. Cliniques Universitaires Saint Luc - Université Catholique de Louvain, Woluwe-Saint-Lambert, Belgium
    • Omoumi, Patrick. Cliniques Universitaires Saint Luc - Université Catholique de Louvain, Woluwe-Saint-Lambert, Belgium
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • European Radiology, 2014, vol. 24, no. 7, p. 1707-1714. Springer Berlin Heidelberg
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:326001
    Summary
    Objective: To determine the means and the reference intervals of the quantitative morphometric parameters of femoroacetabular impingement (FAI) in normal hips with high-resolution computed tomography (CT). Methods: We prospectively included 94 adult individuals who underwent CT for thoracic, abdominal or urologic pathologies. Patients with a clinical history of hip pathology and/or with osteoarthritis on CT were excluded. We calculated means and 95% reference intervals for imaging signs of cam-type (alpha angle at 90° and 45° and femoral head-neck offset) and pincer-type impingement (acetabular version angle, lateral centre-edge angle and acetabular index). Results: The 95% reference interval limits were all far beyond the abnormal thresholds found in the literature for cam-type and to a lesser extent for pincer-type FAI. The upper limits of the reference intervals for the alpha angles (at 90°/45°) were 68°/83° (men) and 69°/84° (women), compared to thresholds from the literature (50°, 55° or 60°). Reference intervals were similar between genders for cam-type parameters, and slightly differed for pincer-type. Conclusion: The 95% reference intervals of morphometric measurements of FAI in asymptomatic hips were beyond the abnormal thresholds, which was especially true for cam-type FAI. Our results suggest the need for redefining the current morphometric parameters used in the diagnosis of FAI. Key Points : • 95% reference intervals limits of FAI morphotype were beyond currently defined thresholds. • Reference intervals of pincer-type morphotype measurements were close to current definitions. • Reference intervals of cam-type morphotype measurements were far beyond the current definitions. • Current morphometric definitions of cam-type morphotype should be used with care.