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Citation:
Feger J, Roberts D, Femoral head-neck offset (femoroacetabular impingement). Reference article, Radiopaedia.org (Accessed on 19 Apr 2024) https://doi.org/10.53347/rID-79782
Femoral head-neck offset is a measurement for the characterization of hip morphology.
Femoral head-neck offset is used for quantitative characterization of the femoral head-neck junction, in particular in the setting of suspected femoroacetabular impingement for the detection of cam morphology and preoperative planning.
The distance between the tangent of the femoral neck and a tangent cutting the femoral head is obtained with both tangents paralleling the femoral neck axis.
In addition, a head-neck offset ratio can be determined by dividing the femoral head-neck measurement by the femoral head diameter 2-4. This can be done radiographically from lateral views of the hip 2-4 or with CT 5 or MRI 6
Radiographically a femoral head-neck offset ratio <0.17 is considered indicative for cam morphology 2-5.
Femoral offset measurements in the anterosuperior position in MRI yielded the smallest values with a suggested threshold of 6-7 mm 6 with sensitivities and specificities in the 55-65% range 6.
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1. Palmer W, Bancroft L, Bonar F et al. Glossary of Terms for Musculoskeletal Radiology. Skeletal Radiol. 2020;49(S1):1-33. doi:10.1007/s00256-020-03465-1 - Pubmed
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2. Clohisy J, Carlisle J, Beaulé P et al. A Systematic Approach to the Plain Radiographic Evaluation of the Young Adult Hip. J Bone Joint Surg. 2008;90(Supplement_4):47-66. doi:10.2106/jbjs.h.00756 - Pubmed
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3. Peelle M, Della Rocca G, Maloney W, Curry M, Clohisy J. Acetabular and Femoral Radiographic Abnormalities Associated with Labral Tears. Clin Orthop Relat Res. 2005;441(&NA;):327-33. doi:10.1097/01.blo.0000181147.86058.74 - Pubmed
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4. Atkins P, Shin Y, Agrawal P et al. Which Two-Dimensional Radiographic Measurements of Cam Femoroacetabular Impingement Best Describe the Three-Dimensional Shape of the Proximal Femur? Clin Orthop Relat Res. 2018;477(1):242-53. doi:10.1097/corr.0000000000000462 - Pubmed
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5. Wells J, Nepple J, Crook K et al. Femoral Morphology in the Dysplastic Hip: Three-Dimensional Characterizations With CT. Clinical Orthopaedics & Related Research. 2017;475(4):1045-54. doi:10.1007/s11999-016-5119-2 - Pubmed
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6. Ehrmann C, Rosskopf A, Pfirrmann C, Sutter R. Beyond the Alpha Angle: Alternative Measurements for Quantifying Cam-Type Deformities in Femoroacetabular Impingement. J Magn Reson Imaging. 2015;42(4):1024-31. doi:10.1002/jmri.24861 - Pubmed
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