Prevalence of cam-type deformity on hip magnetic resonance imaging in young males: a cross-sectional study

Reichenbach, S; Jüni, P; Werlen, S; Nüesch, E; Pfirrmann, CW; Trelle, S; Odermatt, A; Hofstetter, W; Ganz, R; Leunig, M (2010). Prevalence of cam-type deformity on hip magnetic resonance imaging in young males: a cross-sectional study. Arthritis & rheumatism, 62(9), pp. 1319-1327. Hoboken, N.J.: Wiley-Blackwell 10.1002/acr.20198

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Objective To determine the prevalence of cam-type deformities on hip magnetic resonance imaging (MRI) in young males. Methods This was a population-based cross-sectional study in young asymptomatic male individuals who underwent clinical examination and completed a self-report questionnaire. A random sample of participants was invited for MRI of the hip. We graded the maximal offset at the femoral head–neck junction on radial sequences using grades from 0 to 3, where 0 = normal, 1 = possible, 2 = definite, and 3 = severe deformity. The prespecified main analyses were based on definite cam-type deformity grades 2 or 3. We estimated the prevalence of the cam-type deformity adjusted for the sampling process overall and according to the extent of internal rotation. Then we determined the location of the deformity on radial MRI sequences. Results A total of 1,080 subjects were included in the study and 244 asymptomatic males with a mean age of 19.9 years attended MRI. Sixty-seven definite cam-type deformities were detected. The adjusted overall prevalence was 24% (95% confidence interval [95% CI] 19–30%). The prevalence increased with decreasing internal rotation (P < 0.001 for trend). Among those with a clinically decreased internal rotation of <30°, the estimated prevalence was 48% (95% CI 37–59%). Sixty-one of 67 cam-type deformities were located in an anterosuperior position. Conclusion Cam-type deformities can be found on MRI in every fourth young asymptomatic male individual and in every second male with decreased internal rotation. The majority of deformities are located in an anterosuperior position.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > Institute of Social and Preventive Medicine (ISPM)
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Forschungsgruppe Knochenbiologie & Orthopädische Forschung
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DBMR Forschung Mu35 > Forschungsgruppe Knochenbiologie & Orthopädische Forschung

04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery

UniBE Contributor:

Reichenbach, Stephan; Jüni, Peter; Nüesch, Eveline; Trelle, Sven; Hofstetter, Willy and Ganz, Reinhold

ISSN:

0004-3591

Publisher:

Wiley-Blackwell

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:09

Last Modified:

11 Sep 2017 13:36

Publisher DOI:

10.1002/acr.20198

PubMed ID:

20853471

Web of Science ID:

000281913400017

BORIS DOI:

10.7892/boris.875

URI:

https://boris.unibe.ch/id/eprint/875 (FactScience: 201138)

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