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Prevalence of radiological signs of femoroacetabular impingement in patients presenting with long standing adductor related groin pain.
  1. Adam Weir (adsinoz{at}hotmail.com)
  1. The Hague Medical Centre: Antoniushove hospital, Netherlands
    1. Robert-Jan de Vos (rj_devos{at}hotmail.com)
    1. The Hague Medical Centre: Antoniushove hospital, Netherlands
      1. Maarten Moen (mh_moen{at}hotmail.com)
      1. Rijnland hospital, department of sports medicine, Netherlands
        1. Per Hölmich (per.holmich{at}amh.regionh.dk)
        1. Amager Hospital, Faculty of Health Sciences, University of Copenhagen, Denmark
          1. Johannes L Tol (h.tol{at}mchaaglanden.nl)
          1. The Hague Medical Centre: Antoniushove hospital, Netherlands

            Abstract

            Objective: A decreased range of motion of the hip joint is known to predispose to athletic groin injury. Femoroacetabular impingement (FAI) of the hip leads to a reduced range of motion (ROM). This study examined the prevalence of radiological signs of FAI in patients presenting with long-standing adductor related groin pain (LSARGP).

            Design: Prospective case series.

            Setting: Outpatient sports medicine department.

            Patients: 34 athletes with LSARGP defined as; pain on palpation of the proximal insertion of adductor muscle and a painful resisted adduction test.

            Assessment: A clinician blinded to the results of the radiological assessment performed a physical examination: iliopsoas length, hip ROM and anterior hip impingement test.

            Antero-posterior pelvic radiographs were examined by a second blinded clinician for the presence of: pistol grip deformity, centrum-collum-diaphyseal angle, femoral head neck ratio, coxa profunda, protrusio acetabuli, lateral centre edge angle, acetabular index and cross over sign.

            Results: The prevalence of radiological signs of FAI was 94% (64/68). The mean number of radiological signs in hips with LSARGP was 1.84 (range 0-4, SD 1.05) and 1.96 (range 0-5, SD1.12) in asymptomatic groins (P = 0.95).

            The anterior hip impingement test was positive in nine cases. There was no relationship with the number of radiological signs (p=0.95). There was no correlation between hip ROM and the number of radiological signs (p=0.37).

            Conclusion: Radiological signs of FAI are frequently observed in patients presenting with LSARGP. Clinicians should be aware of this fact and the possible lack of correlation when assessing athletes with groin pain.

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