Anatomic Features Associated With Femoroacetabular Impingement Are Equally Common in Hips of Old and Young Asymptomatic Individuals Without CT Signs of Osteoarthritis

Omoumi, Patrick; Thiéry, Cécile; Michoux, Nicolas; Lecouvet, Frédéric; Berg, Bruno C. Vande

doi:10.2214/ajr.12.10083

Cited by 27 publications

(25 citation statements)

References 38 publications

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“…Using the same diagnostic criteria used in this study, Kang et al and Omoumi et al 16 42 reported the prevalence of cam morphology in the general population to be 12 and 30% of participants, respectively. Other research assessing hip morphology in various groups of athletes has reported a wide range of prevalence estimates from 2% to 92% of hips affected 13.…”

Section: Discussionmentioning

confidence: 71%

Hip morphology in elite golfers: asymmetry between lead and trail hips

et al. 2016

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AimDuring a golf swing, the lead hip (left hip in a right-handed player) rotates rapidly from external to internal rotation, while the opposite occurs in the trail hip. This study assessed the morphology and pathology of golfers’ hips comparing lead and trail hips.MethodsA cohort of elite golfers were invited to undergo MRI of their hips. Hip morphology was evaluated by measuring acetabular depth (pincer shape=negative measure), femoral neck antetorsion (retrotorsion=negative measure) and α angles (cam morphology defined as α angle >55° anteriorly) around the axis of the femoral neck. Consultant musculoskeletal radiologists determined the presence of intra-articular pathology.Results55 players (mean age 28 years, 52 left hip lead) underwent MRI. No player had pincer morphology, 2 (3.6%) had femoral retrotorsion and 9 (16%) had cam morphology. 7 trail hips and 2 lead hips had cam morphology (p=0.026). Lead hip femoral neck antetorsion was 16.7° compared with 13.0° in the trail hip (p<0.001). The α angles around the femoral neck were significantly lower in the lead compared with trail hips (p<0.001), with the greatest difference noted in the anterosuperior portion of the head neck junction; 53° vs 58° (p<0.001) and 43° vs 47° (p<0.001). 37% of trail and 16% of lead hips (p=0.038) had labral tears.ConclusionsGolfers’ lead and trail hips have different morphology. This is the first time side-to-side asymmetry of cam prevalence has been reported. The trail hip exhibited a higher prevalence of labral tears.

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Section: Discussionmentioning

confidence: 71%

Hip morphology in elite golfers: asymmetry between lead and trail hips

et al. 2016

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“…32 It has been shown that even by increasing the alpha angle cut-off from just 55 to 60 degrees a marked reduction in the prevalence of cam morphology from 30-61% to 17-47% is seen. 33 A further reason for a smaller proportion of cam morphology in this sample may relate to only performing a single view radiograph, and including an AP radiograph may capture cam morphology in more participants. 21 The smaller proportion of players with cam morphology within this sample may also relate to players having a lower frequency of training due to the current practices of Australian Football if a relationship between training and the development of cam morphology truly exists.…”

Section: Discussionmentioning

confidence: 99%

Clinical Measures of Hip Range of Motion Do Not Correlate With the Degree of Cam Morphology in Semi-Elite Australian Footballers: A Cross-Sectional Study

Murphy

Kemp

Smith

et al. 2017

Intl J Sports Phys Ther

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Background: Clinical testing to determine the presence of a cam morphology is becoming more common however the correlation between hip range of motion and the degree of cam morphology remains controversial in the literature. The prevalence of a cam morphology in athletes has been reported as higher than in the general population but the prevalence of cam morphology has not been reported in Australian Football (AF). Purpose:The purpose of this study was to determine the correlation between hip range of motion and hip alpha angle and report the proportion of players with a cam morphology in a sample of AF players.Design: Cross-sectional Study.Methods: Twenty-one semi-elite AF players (42 hips) from the Peel Thunder Football Club were included in this study. A hip Flexion Internal Rotation (IR) test and a modified maximal squat test using the difference in depth of squat in hip internal and external rotation were used. These measures were then compared to alpha angles on 90 degree Dunn view x-rays.Results: Four of the 42 hips (9.5%) had a cam morphology (alpha angle >60 degrees). There was no significant correlation between alpha angle and ROM in a Flexion IR test or the difference in modified maximal squat test depth within this sample of players. Conclusions:The proportion of cam morphology seems to be lower in this sample than the previously reported prevalence in other sports. The lack of correlations between hip range and hip alpha angle in players means that screening hips using clinical measures to detect cam morphology associated with poor hip range of motion may be inaccurate. Level of Evidence: Level 3a

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“…59 Cam type deformities are highly prevalent in asymptomatic individuals. In fact the overlapping of alpha angles in asymptomatic individuals and in FAI patients has spurred scientific controversy, 12,18,35,42,44,45,48,52,54 moderate skepticism 41 and sarcastic opinions. 53 For the advocates of the FAI concept, we are talking about predisposed individuals that may require specialized orthopedic attention.…”

Section: Anterior Sphericity Deficitmentioning

confidence: 99%