{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T03:58:14Z","timestamp":1784260694077,"version":"3.55.0"},"reference-count":42,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2020,10,21]],"date-time":"2020-10-21T00:00:00Z","timestamp":1603238400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2020,10,21]],"date-time":"2020-10-21T00:00:00Z","timestamp":1603238400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"},{"start":{"date-parts":[[2020,10,21]],"date-time":"2020-10-21T00:00:00Z","timestamp":1603238400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2021,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The purpose of this study was to examine the existing literature to determine the dimensions of the acetabular labrum, with a focus on hypotrophic labra, including the modalities and accuracy of measurement, factors associated with smaller labra, and any impacts on surgical management.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Four databases (PubMed, Ovid [MEDLINE], Cochrane Database, and EMBASE) were searched from database inception to January 2020. Two reviewers screened the literature independently and in duplicate. Methodological quality of included papers was assessed using the Methodological Index for Non\u2010Randomized Studies (MINORS) criteria. Where possible, data on labral size were combined using a random effects model.\n<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Twenty\u2010one studies (5 level II, 9 level III, 7 level IV) were identified. This resulted in 6,159 patients (6,436 hips) with a mean age of 34.3 years (range 8.4\u201385). The patients were 67.3% female with an average follow\u2010up of 57.3\u00a0months. There was no consistent definition of labral size quoted throughout the literature. The mean width on MRI\/MRA was 7.3\u00a0mm (95% CI 6.9\u20137.8\u00a0mm), on computed tomography arthrography was 8.7\u00a0mm (95% CI 8.0\u20139.3), and during arthroscopy was 5.0\u00a0mm (95% CI 4.9\u20135.2). Inter\u2010observer reliability was good to excellent in all modalities. Labral hypotrophy may be associated with increased acetabular coverage. Hypertrophic labra were highly associated with acetabular dysplasia (<jats:italic>r<\/jats:italic>\u2009=\u2009\u2212 0.706, \u2212 0.596, \u2212 0.504, respectively; <jats:italic>P<\/jats:italic>\u2009&lt;\u20090.001).\n<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Labral width can reliably be measured utilizing imaging techniques including magnetic resonance and computed tomography. The pooled mean labral width was 6.2\u00a0mm, and height 4.6\u00a0mm. The establishment of a gold\u2010standard of measurement on arthroscopy and advanced imaging would aid in clinical decision\u2010making regarding treatment options for patients presenting with a painful hip, particularly those with hypoplastic labra, and provide radiological guidelines for standardized labrum size classifications.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>Level IV.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-020-06330-9","type":"journal-article","created":{"date-parts":[[2020,10,21]],"date-time":"2020-10-21T05:03:01Z","timestamp":1603256581000},"page":"1432-1452","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["The dimensions of the hip labrum can be reliably measured using magnetic resonance and computed tomography which can be used to develop a standardized definition of the hypoplastic labrum"],"prefix":"10.1002","volume":"29","author":[{"given":"Madison","family":"Walker","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Michael G. DeGroote School of Medicine McMaster University Hamilton ON Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Larissa","family":"Maini","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Michael G. DeGroote School of Medicine McMaster University Hamilton ON Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeffrey","family":"Kay","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Division of Orthopaedic Surgery, Department of Surgery McMaster University, McMaster University Medical Centre 1200 Main St West, 4E15 L8N 3Z5 Hamilton ON Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mikael","family":"Sansone","sequence":"additional","affiliation":[{"name":"<!--<label>3<\/label>--> Department of Orthopaedics, Institute of Clinical Sciences, The Sahlgrenska Academy University of Gothenburg Gothenburg Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vasco V.","family":"Mascarenhas","sequence":"additional","affiliation":[{"name":"<!--<label>4<\/label>--> Musculoskeletal Imaging Unit, Imaging Center Hospital da Luz Lisbon Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicole","family":"Simunovic","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Division of Orthopaedic Surgery, Department of Surgery McMaster University, McMaster University Medical Centre 1200 Main St West, 4E15 L8N 3Z5 Hamilton ON Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4219-8564","authenticated-orcid":false,"given":"Olufemi R.","family":"Ayeni","sequence":"additional","affiliation":[{"name":"<!--<label>2<\/label>--> Division of Orthopaedic Surgery, Department of Surgery McMaster University, McMaster University Medical Centre 1200 Main St West, 4E15 L8N 3Z5 Hamilton ON 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