MRI Findings of Femoroacetabular Impingement
- 1 December 2006
- journal article
- clinical trial
- Published by American Roentgen Ray Society in American Journal of Roentgenology
- Vol. 187 (6), 1412-1419
- https://doi.org/10.2214/ajr.05.1415
Abstract
OBJECTIVE. The purpose of our study was to evaluate MRI in the identification of labral and articular cartilage lesions in patients with a clinical suspicion of femoroacetabular impingement. MATERIALS AND METHODS. Preoperative MRI was performed in 46 consecutive patients (26 men, 20 women; age range, 21-45 years; mean age, 32.3 years) for whom femoroacetabular impingement was clinically suspected. Two musculoskeletal radiologists independently assessed the MR images for the presence and anatomic site of labral disorders, labral-chondral transitional zone disorders, femoral cartilage lesions, and acetabular cartilage lesions. Surgical correlation was obtained in all cases by two surgeons who were experienced in hip arthroscopy. RESULTS. Seven patients showed labral tears on MRI that were confirmed surgically in all cases. Thirty-seven patients (97%) of the 38 surgically confirmed cases had lesions of the labral-chondral transitional zone on MRI. The sites of labral-chondral transitional zone abnormalities at arthroscopy were 50% anterosuperior, 36% anterosuperior and superolateral, 11% superolateral, and 3% superolateral and posterosuperior. The site was identified correctly in 92% (reviewer 1) and 95% (reviewer 2) of cases on MRI. Separate acetabular cartilage abnormality was surgically identified in 39% of cases, and femoral cartilage lesions were found in 20%. The acetabular chondral lesions were correctly identified in 89-94% of cases. CONCLUSION. MRI provides a useful assessment of patients in whom a femoroacetabular impingement is clinically suspected. A high-resolution, nonarthrographic technique can provide preoperative information regarding the presence and anatomic site of labral and cartilage abnormalities.Keywords
This publication has 28 references indexed in Scilit:
- Magnetic Resonance Arthrography versus Arthroscopy in the Evaluation of Articular Hip PathologyPublished by Ovid Technologies (Wolters Kluwer Health) ,2004
- Magnetic Resonance Arthrography of Labral Disorders in Hips with Dysplasia and ImpingementPublished by Ovid Technologies (Wolters Kluwer Health) ,2004
- Acetabular Rim DegenerationClinical Orthopaedics & Related Research, 2003
- The contour of the femoral head-neck junction as a predictor for the risk of anterior impingementThe Journal of Bone and Joint Surgery, 2002
- The Role of Labral Lesions to Development of Early Degenerative Hip DiseaseClinical Orthopaedics and Related Research, 2001
- Anatomy, Histologic Features, and Vascularity of the Adult Acetabular LabrumClinical Orthopaedics and Related Research, 2001
- MR arthrography of the adult acetabular capsular-labral complex: correlation with surgery and anatomy.American Journal of Roentgenology, 1999
- Evaluation Of The Acetabular Labrum By MR ArthrographyThe Journal of Bone and Joint Surgery, 1997
- The acetabular rim syndrome. A clinical presentation of dysplasia of the hipThe Journal of Bone and Joint Surgery. British volume, 1991
- The torn acetabular labrumThe Journal of Bone and Joint Surgery. British volume, 1986