• Arch Orthop Trauma Surg · Aug 2019

    The prevalence of a prominent anterior inferior iliac spine.

    • Antonio Klasan, Thomas Neri, Sven Edward Putnis, Philipp Dworschak, Karl Friedrich Schüttler, Susanne Fuchs-Winkelmann, Markus D Schofer, and Thomas J Heyse.
    • Center for Orthopedics and Traumatology, University Hospital Marburg, Baldingerstrasse, 35043, Marburg, Germany. klasan.antonio@me.com.
    • Arch Orthop Trauma Surg. 2019 Aug 1; 139 (8): 1045-1049.

    IntroductionImpingement of the prominent anterior inferior iliac spine (AIIS) against the femoral neck has recently been described as another type of impingement. The purpose of this study is to provide a distribution of AIIS types using the classification proposed by Hetsroni and thus report on the prevalence of prominent types.Materials And MethodsA total of 400 patients were included in the study with an average age 27.3 ± 6.9 years (range 18-40). All patients received a whole-body polytrauma computer tomography (CT) scan in the emergency room (ER) upon arrival. The classification of AIIS proposed by Hetsroni et al., which describes three morphological types, was used. Type II and III were grouped as prominent types. The measurements were performed in all three planes by two examiners.ResultsMale to female ratio was 71:29. Type I was observed in 367 (91.7%) patients. Type II was observed in 31 (7.8%) patients and type III was observed in 2 (0.5%) patients, unilaterally. Prominent types were much more prevalent in men (10.5%) than in women (2.6%). The CT assessment demonstrated excellent intra- and interreliability (overall: 0.926, I/II: 0.906, III: 1.000).ConclusionA young population demonstrates a prevalence of a prominent AIIS of 11.5%. Prominent AIIS is more common in men than in women.

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