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Radiographic signs associated with femoroacetabular impingement occur with high prevalence at all ages in a hospital population

  • Musculoskeletal
  • Published:
European Radiology Aims and scope Submit manuscript

Abstract

Objectives

Femoroacetabular impingement (FAI) is increasingly diagnosed clinically. Controversy exists about the significance of radiographic findings. Our goal is to determine the prevalence of radiographic FAI types and parameters in a hospital population clinically not suspected of having FAI. In addition we assessed whether pain, age and gender are associated with higher prevalences.

Methods

Three hundred ten patients were included in this retrospective study. After applying the exclusion criteria, 262 patients (522 hips) remained. Two observers scored for radiographic parameters. A generalised estimation equation, Pearson’s χ2 test and logistic regression model were used.

Results

Radiographic signs of FAI were absent in only 58 hips (11.1 %). In the 40 hips (7.7 %) with cam impingement, males were more affected (P < 0.001). In the 330 hips (63.2 %) with pincer impingement, females were more often affected (P < 0.001). In the 82 hips (15.7 %) with signs of mixed type impingement, male hips were significantly (P < 0.001) more often affected. Age had some effect on the prevalence of coxa vara, acetabular index and acetabular retroversion. No correlation with pain was found.

Conclusions

In this hospital population, signs occurred at a high rate. Radiographic parameters attributed to FAI are non-specific. Especially radiographic signs attributed to pincer type impingement have a high prevalence.

Key Points

• Femoroacetabular impingement is associated with an abnormal configuration of the hip joint.

• The prevalence of femoroacetabular impingement parameters was high in our study population.

• The diagnosis of femoroacetabular impingement should be made clinically.

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Abbreviations

FAI:

Femoroacetabular impingement

NSA:

Neck shaft angle

AI:

Acetabular index

CE:

Angle centre edge angle

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Authors and Affiliations

  1. Radiology Department, Leiden University Medical Center, Albinusdreef 2, 2300 RC, Leiden, The Netherlands

    F. de Bruin, M. Reijnierse, V. Farhang-Razi & J. L. Bloem

Authors
  1. F. de Bruin
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  2. M. Reijnierse
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  3. V. Farhang-Razi
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  4. J. L. Bloem
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Correspondence to F. de Bruin.

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de Bruin, F., Reijnierse, M., Farhang-Razi, V. et al. Radiographic signs associated with femoroacetabular impingement occur with high prevalence at all ages in a hospital population. Eur Radiol 23, 3131–3139 (2013). https://doi.org/10.1007/s00330-013-2912-0

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  • DOI: https://doi.org/10.1007/s00330-013-2912-0

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