{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T10:09:36Z","timestamp":1774606176007,"version":"3.50.1"},"reference-count":18,"publisher":"Springer Science and Business Media LLC","issue":"9","license":[{"start":{"date-parts":[[2021,3,13]],"date-time":"2021-03-13T00:00:00Z","timestamp":1615593600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2021,3,13]],"date-time":"2021-03-13T00:00:00Z","timestamp":1615593600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/501100006390","name":"Universit\u00e9 de Lausanne","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100006390","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Eur Radiol"],"published-print":{"date-parts":[[2021,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec>\n                <jats:title>Objective<\/jats:title>\n                <jats:p>To estimate the prevalence of acetabular rim ossifications in the adult population with asymptomatic, morphologically normal hips at CT and to determine whether the presence of these ossifications is associated with patient- or hip-related parameters.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>We prospectively included all patients undergoing thoracoabdominal CT over a 3-month period. After exclusion of patients with a clinical history of hip pathology and\/or with signs of osteoarthritis on CT, we included a total of 150 hips from 75 patients. We analyzed the presence and the size of ossifications around the acetabular rim. The relationships between the size of acetabular rim ossifications and patient-related (sex, age, BMI) or hip-related parameters (joint space width, and cam- and pincer-type femoroacetabular impingement morphology) were tested using multiple regression analysis.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>The prevalence of acetabular rim ossifications in this population of asymptomatic, non-osteoarthritic hips was 96% (95% CI = [80.1; 100.0]). The presence of ossifications and their size were correlated between the right and left hips (Spearman coefficient = 0.64 (95% CI = [0.46;0.79]), <jats:italic>p<\/jats:italic> &lt; 0.05)). The size of acetabular rim ossifications was significantly associated with age (<jats:italic>p<\/jats:italic> &lt; 0.0001) but not with BMI (<jats:italic>p<\/jats:italic> = 0.35), gender (<jats:italic>p<\/jats:italic> = 0.05), joint space width (<jats:italic>p<\/jats:italic> \u2265 0.53 for all locations), or any of the qualitative or quantitative parameters associated with femoroacetabular morphology (<jats:italic>p<\/jats:italic> \u2265 0.34).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>Acetabular rim ossifications are highly prevalent in asymptomatic, non-osteoarthritic adult hips at all ages. Their size is not correlated with any patient- or hip-related parameters except for age. These findings suggest that ossifications at the acetabular rim, when present in isolation, should not be considered a sign of osteoarthritis or femoroacetabular impingement morphology.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Key Points<\/jats:title>\n                <jats:p><jats:italic>\u2022 Acetabular rim ossifications are extremely common in asymptomatic, non-osteoarthritic adult hips.<\/jats:italic><\/jats:p>\n                <jats:p><jats:italic>\u2022 Acetabular rim ossifications are present independently from other signs of osteoarthritis in adult hips at all ages and should not be interpreted as a pathological finding.<\/jats:italic><\/jats:p>\n                <jats:p><jats:italic>\u2022 The diagnosis of osteoarthritis or femoroacetabular impingement morphology should not be made based on the sole presence of ossifications at the acetabular rim.<\/jats:italic><\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00330-021-07750-y","type":"journal-article","created":{"date-parts":[[2021,3,13]],"date-time":"2021-03-13T19:02:17Z","timestamp":1615662137000},"page":"6802-6809","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Ossification of the acetabular rim: a highly prevalent finding in asymptomatic non-osteoarthritic hips of all ages"],"prefix":"10.1007","volume":"31","author":[{"given":"Catarina","family":"Valente","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Laura","family":"Haefliger","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Julien","family":"Favre","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3251-3666","authenticated-orcid":false,"given":"Patrick","family":"Omoumi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2021,3,13]]},"reference":[{"key":"7750_CR1","doi-asserted-by":"publisher","first-page":"10","DOI":"10.2106\/JBJS.J.01799","volume":"93","author":"K Corten","year":"2011","unstructured":"Corten K, Ganz R, Chosa E, Leunig M (2011) Bone apposition of the acetabular rim in deep hips. J Bone Joint Surg Am 93:10\u201316","journal-title":"J Bone Joint Surg Am"},{"key":"7750_CR2","doi-asserted-by":"publisher","first-page":"15","DOI":"10.1136\/ard.29.1.15","volume":"29","author":"PD Byers","year":"1970","unstructured":"Byers PD, Contepomi CA, Farkas TA (1970) A post mortem study of the hip joint. Including the prevalence of the features of the right side. Ann Rheum Dis 29:15\u201331","journal-title":"Ann Rheum Dis"},{"key":"7750_CR3","doi-asserted-by":"publisher","first-page":"511","DOI":"10.1007\/s007760070031","volume":"5","author":"S Ninomiya","year":"2000","unstructured":"Ninomiya S, Shimabukuro A, Tanabe T, Kim YT, Tachibana Y (2000) Ossification of the acetabular labrum. J Orthop Sci 5:511\u2013514","journal-title":"J Orthop Sci"},{"key":"7750_CR4","doi-asserted-by":"publisher","first-page":"661","DOI":"10.1016\/j.mric.2019.07.002","volume":"27","author":"C Mourad","year":"2019","unstructured":"Mourad C, Omoumi P, Malghem J, Vande Berg BC (2019) Conventional radiography of the hip revisited: correlation with advanced imaging. Magn Reson Imaging Clin N Am 27:661\u2013683","journal-title":"Magn Reson Imaging Clin N Am"},{"key":"7750_CR5","doi-asserted-by":"publisher","first-page":"507","DOI":"10.1055\/s-0037-1606136","volume":"21","author":"P Omoumi","year":"2017","unstructured":"Omoumi P, Vande Berg B (2017) Hip imaging: normal variants and asymptomatic findings. Semin Musculoskelet Radiol 21:507\u2013517","journal-title":"Semin Musculoskelet Radiol"},{"key":"7750_CR6","doi-asserted-by":"publisher","first-page":"41","DOI":"10.3109\/03008207709152611","volume":"5","author":"PD Byers","year":"1977","unstructured":"Byers PD, Maroudase A, Oztop F, Stockwell RA, Venn MF (1977) Histological and biochemical studies on cartilage from osteoarthrotic femoral heads with special reference to surface characteristics. Connect Tissue Res 5:41\u201349","journal-title":"Connect Tissue Res"},{"key":"7750_CR7","doi-asserted-by":"publisher","first-page":"1022","DOI":"10.1016\/j.arthro.2015.12.042","volume":"32","author":"JW Byrd","year":"2016","unstructured":"Byrd JW, Jones KS, Freeman CR (2016) Surgical outcome of pincer femoroacetabular impingement with and without labral ossification. Arthroscopy 32:1022\u20131029","journal-title":"Arthroscopy"},{"key":"7750_CR8","doi-asserted-by":"crossref","unstructured":"Altman RD, Gold GE (2007) Atlas of individual radiographic features in osteoarthritis, revised. Osteoarthritis Cartilage 15(Suppl A):A1\u2013A56","DOI":"10.1016\/j.joca.2006.11.009"},{"key":"7750_CR9","doi-asserted-by":"publisher","first-page":"1145","DOI":"10.1136\/ard.2003.018424","volume":"63","author":"M Lequesne","year":"2004","unstructured":"Lequesne M, Malghem J, Dion E (2004) The normal hip joint space: variations in width, shape, and architecture on 223 pelvic radiographs. Ann Rheum Dis 63:1145\u20131151","journal-title":"Ann Rheum Dis"},{"key":"7750_CR10","doi-asserted-by":"publisher","first-page":"246","DOI":"10.1136\/ard.58.4.246","volume":"58","author":"P Reis","year":"1999","unstructured":"Reis P, Nahal-Said R, Ravaud P, Dougados M, Amor B (1999) Are radiological joint space widths of normal hips asymmetrical. Ann Rheum Dis 58:246\u2013249","journal-title":"Ann Rheum Dis"},{"key":"7750_CR11","doi-asserted-by":"crossref","unstructured":"Byrd JWT (2013) Femoroacetabular impingement in athletes: current concepts. Am J Sports Med 42(3):737\u2013751","DOI":"10.1177\/0363546513499136"},{"key":"7750_CR12","doi-asserted-by":"crossref","unstructured":"Omoumi P, Thiery C, Michoux N, Malghem J, Lecouvet FE, Vande Berg BC (2014) Anatomic features associated with femoroacetabular impingement are equally common in hips of old and young asymptomatic individuals without CT signs of osteoarthritis. AJR Am J Roentgenol 202:1078\u20131086","DOI":"10.2214\/AJR.12.10083"},{"key":"7750_CR13","doi-asserted-by":"crossref","unstructured":"Lepage-Saucier M, Thi\u00e9ry C, Larbi A, Lecouvet FE, Vande Berg BC, Omoumi P (2014) Femoroacetabular impingement: normal values of the quantitative morphometric parameters in asymptomatic hips. Eur Radiol 24:1707\u20131714","DOI":"10.1007\/s00330-014-3171-4"},{"key":"7750_CR14","doi-asserted-by":"publisher","first-page":"393","DOI":"10.1007\/s00256-008-0448-1","volume":"37","author":"NA Obuchowski","year":"2008","unstructured":"Obuchowski NA, Lieber ML (2008) Statistics and methodology. Skeletal Radiol 37:393\u2013396","journal-title":"Skeletal Radiol"},{"key":"7750_CR15","doi-asserted-by":"publisher","first-page":"20120182","DOI":"10.1259\/bjr.20120182","volume":"86","author":"WR Cooke","year":"2013","unstructured":"Cooke WR, Gill HS, Murray DW, Ostlere SJ (2013) Discrete mineralisation of the acetabular labrum: a novel marker of femoroacetabular impingement. Br J Radiol 86:20120182","journal-title":"Br J Radiol"},{"key":"7750_CR16","doi-asserted-by":"publisher","first-page":"526","DOI":"10.2214\/AJR.13.10913","volume":"201","author":"DA Rubin","year":"2013","unstructured":"Rubin DA (2013) Femoroacetabular impingement: fact, fiction, or fantasy. AJR Am J Roentgenol 201:526\u2013534","journal-title":"AJR Am J Roentgenol"},{"key":"7750_CR17","doi-asserted-by":"publisher","first-page":"859","DOI":"10.1016\/S0021-9290(01)00040-9","volume":"34","author":"G Bergmann","year":"2001","unstructured":"Bergmann G, Deuretzbacher G, Heller M et al (2001) Hip contact forces and gait patterns from routine activities. J Biomech 34:859\u2013871","journal-title":"J Biomech"},{"issue":"Suppl 3","key":"7750_CR18","first-page":"99","volume":"91","author":"PJ Karanicolas","year":"2009","unstructured":"Karanicolas PJ, Bhandari M, Kreder H et al (2009) Evaluating agreement: conducting a reliability study. J Bone Joint Surg Am 91(Suppl 3):99\u2013106","journal-title":"J Bone Joint Surg Am"}],"container-title":["European Radiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00330-021-07750-y.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s00330-021-07750-y\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00330-021-07750-y.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,8,20]],"date-time":"2021-08-20T14:23:41Z","timestamp":1629469421000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s00330-021-07750-y"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,3,13]]},"references-count":18,"journal-issue":{"issue":"9","published-print":{"date-parts":[[2021,9]]}},"alternative-id":["7750"],"URL":"https:\/\/doi.org\/10.1007\/s00330-021-07750-y","relation":{},"ISSN":["0938-7994","1432-1084"],"issn-type":[{"value":"0938-7994","type":"print"},{"value":"1432-1084","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,3,13]]},"assertion":[{"value":"17 November 2020","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"23 December 2020","order":2,"name":"revised","label":"Revised","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"4 February 2021","order":3,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"13 March 2021","order":4,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The scientific guarantor of this publication is Dr. Patrick Omoumi, Lausanne University Hospital.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Guarantor"}},{"value":"The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"Hugo Babel kindly provided statistical advice for this manuscript.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Statistics and biometry"}},{"value":"Written informed consent was waived by the Institutional Review Board.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Informed consent"}},{"value":"Institutional Review Board approval was obtained (Commission d'Ethique Biom\u00e9dicale Hospitalo-Facultaire, Cliniques Universitaires Saint Luc - Universit\u00e9 Catholique de Louvain).","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Our sample population is taken from the same cohort of patients as two previously published studies, and partly (about 80%) overlaps with the sample populations of these studies (M. Saucier Lepage et al Femoroacetabular impingement: normal values of the quantitative morphometric parameters in asymptomatic hips. <i>European Radiology<\/i> 2014 24:1707\u20131714 and P. Omoumi et al Anatomic Features Associated with femoroacetabular impingement are equally common in hips of old and young asymptomatic individuals without CT signs of osteoarthritis. <i>AJR<\/i> y 2014; 202:1078-1086). However, the scope of this study is entirely unrelated to these previous studies, and our results have never been published or presented so far.","order":7,"name":"Ethics","group":{"name":"EthicsHeading","label":"Study subjects or cohorts overlap"}},{"value":"\u2022 prospective\u2022 observational\u2022 performed at one institution","order":8,"name":"Ethics","group":{"name":"EthicsHeading","label":"Methodology"}}]}}