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Anterior inferior iliac spine morphology: quantitative and qualitative assessment in an asymptomatic population

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Abstract

Purpose

To assess the prevalence of anterior inferior iliac spine (AIIS) types, and to investigate the quantitative measurements that characterize AIIS morphology in an asymptomatic adult population.

Methods

In this prospective study, 358 hips from 179 consecutive subjects (age range, 19–82 years; 91 males, 88 females), who underwent CT examination for reasons other than hip problems and were negative for hip impingement test, were analyzed. AIIS types were determined (1, flat wall of the ilium between distal end of AIIS and acetebular rim; 2, bony eminence between distal end of AIIS and acetebular rim; and 3, extension of AIIS to the anterior superior acetebular rim) and AIIS tip angle (TA), direct distance (DD) of the anterior acetabular rim to AIIS as well as projectional distances in vertical (VD) and horizontal (HD) planes were measured. Age- and gender-related factors were searched using two-way ANOVA test under three age groups (18–39, 40–59, and ≥ 60 years).

Results

There were 238 (66.5%) type 1, 118 (33.0%) type 2, and two (0.5%) type 3 AIISs, with significant difference between AIIS types among age groups and genders (P < 0.001). VD and DD showed age- and gender-related (P < 0.001, P < 0.001), and TA demonstrated gender-related differences (P < 0.001). Inter-observer agreement was good for TA and moderate to poor for other measurements.

Conclusions

Type 1 AIIS is the most common shape across all age groups in adult females and in young and middle-aged adult males. TA, DD, and VD might be reliably used for the evaluation of AIIS morphology.

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Author notes

  1. Osman Melih Topcuoğlu

    Present address: Department of Radiology, Yeditepe University Faculty of Medicine, Istanbul, Turkey

  2. Anıl Dolgun

    Present address: Mathematical Sciences, School of Science, RMIT University, Melbourne, Australia

Authors and Affiliations

  1. Departments of Radiology, Hacettepe University Faculty of Medicine, Adnan Saygun Caddesi Sihhiye, 06100, Ankara, Turkey

    Osman Melih Topcuoğlu, F. Bilge Ergen, Selin Ardalı, Tijen Cankurtaran & Üstün Aydıngöz

  2. Department of Biostatics, Hacettepe University Faculty of Medicine, Ankara, Turkey

    Anıl Dolgun

Authors
  1. Osman Melih Topcuoğlu
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  2. F. Bilge Ergen
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  3. Selin Ardalı
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  5. Anıl Dolgun
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  6. Üstün Aydıngöz
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Contributions

OMT: Project development, Data Collection, Data Analysis, Manuscript writing/editing. FBE: Project development, Data Collection, Data Analysis, Manuscript writing/editing. SA: Data Collection. TCankurtara: Data Collection. AD: Data Analysis. UA: Manuscript writing/editing.

Corresponding author

Correspondence to F. Bilge Ergen.

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The authors declare that they have no conflict of interest.

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Topcuoğlu, O.M., Ergen, F.B., Ardalı, S. et al. Anterior inferior iliac spine morphology: quantitative and qualitative assessment in an asymptomatic population. Surg Radiol Anat 40, 1275–1281 (2018). https://doi.org/10.1007/s00276-018-2075-4

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  • DOI: https://doi.org/10.1007/s00276-018-2075-4

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