{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T20:45:55Z","timestamp":1790282755453,"version":"4.1.0"},"reference-count":28,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2023,2,18]],"date-time":"2023-02-18T00:00:00Z","timestamp":1676678400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JPM"],"abstract":"<jats:p>(1) Quadriceps tendon rupture (QTR) is a rare pathology, usually occurring in elderly patients with comorbidities, requiring surgical therapy. The aim of this study was to analyze rupture patterns and concomitant injuries using preoperative magnetic resonance imaging (MRI) and to evaluate patient-reported outcome measures. (2) In this retrospective cross-sectional study, 113 patients with QTR were screened and rupture patterns\/concomitant injuries (n = 33) were analyzed via MRI. Clinical outcome was assessed in 45 patients using the International Knee Documentation (IKDC) and Lysholm score with a mean follow-up of 7.2 (\u00b15.0) years. (3) The evaluation of preoperative MRIs showed multiple ruptures of subtendons in 67% with concomitant knee injuries in 45%. The most common associated pathology detected using MRI was pre-existing tendinosis (31.2%). Surgical refixation demonstrated good results with a mean post-operative IKDC score of 73.1 (\u00b114.1) and mean Lysholm score of 84.2 (\u00b116.1). Patient characteristics and individual radiologic rupture patterns did not significantly affect the clinical outcome of patients. (4) Acute QTRs are complex injuries with common involvement of multiple subtendons. MRI imaging can be useful for achieving an accurate diagnosis as pre-existing tendinosis as well as concomitant injuries are common, and might be useful for providing an individual surgical strategy and improving outcomes.<\/jats:p>","DOI":"10.3390\/jpm13020364","type":"journal-article","created":{"date-parts":[[2023,2,20]],"date-time":"2023-02-20T03:29:06Z","timestamp":1676863746000},"page":"364","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Quadriceps Tendon Ruptures in Middle-Aged to Older Patients: A Retrospective Study on the Preoperative MRI Injury Patterns and Mid-Term Patient-Reported Outcome Measures"],"prefix":"10.3390","volume":"13","author":[{"given":"Kim","family":"Loose","sequence":"first","affiliation":[{"name":"Department of Orthopedics and Traumatology, Paracelsus Medical University, Breslauer Stra\u00dfe 201, 90471 Nuremberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Justus","family":"Rudolph","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Paracelsus Medical University, Breslauer Stra\u00dfe 201, 90471 Nuremberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"Schl\u00f6sser","sequence":"additional","affiliation":[{"name":"Department of Radiology, Paracelsus Medical University, Breslauer Stra\u00dfe 201, 90471 Nuremberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1267-200X","authenticated-orcid":false,"given":"Maximilian","family":"Willauschus","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Paracelsus Medical University, Breslauer Stra\u00dfe 201, 90471 Nuremberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7010-8450","authenticated-orcid":false,"given":"Johannes","family":"R\u00fcther","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Paracelsus Medical University, Breslauer Stra\u00dfe 201, 90471 Nuremberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philipp","family":"Schuster","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Paracelsus Medical University, Breslauer Stra\u00dfe 201, 90471 Nuremberg, Germany"},{"name":"RKH Orthopedic Hospital Markgr\u00f6ningen, Center for Sports Orthopedics and Special Joint Surgery, 71706 Markgr\u00f6ningen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hermann Josef","family":"Bail","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Paracelsus Medical University, Breslauer Stra\u00dfe 201, 90471 Nuremberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8856-6441","authenticated-orcid":false,"given":"Michael","family":"Millrose","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Paracelsus Medical University, Breslauer Stra\u00dfe 201, 90471 Nuremberg, Germany"},{"name":"Department of Trauma Surgery and Sports Medicine, Garmisch-Partenkirchen Medical Centre, 82467 Garmisch-Partenkirchen, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3863-1580","authenticated-orcid":false,"given":"Markus","family":"Ge\u00dflein","sequence":"additional","affiliation":[{"name":"Department of Orthopedics and Traumatology, Paracelsus Medical University, Breslauer Stra\u00dfe 201, 90471 Nuremberg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,18]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Deopujari, S., and Kiel, J. (2013). Knee Extensor Mechanism Injuries. Trauma. Inj. Knee, 77\u201386.","DOI":"10.1007\/978-88-470-5298-7_8"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1931","DOI":"10.1016\/j.injury.2012.08.044","article-title":"Clinical Outcomes after Repair of Quadriceps Tendon Rupture: A Systematic Review","volume":"43","author":"Ciriello","year":"2012","journal-title":"Injury"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1338","DOI":"10.1016\/j.injury.2008.06.021","article-title":"The Epidemiology of Musculoskeletal Tendinous and Ligamentous Injuries","volume":"39","author":"Clayton","year":"2008","journal-title":"Injury"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"436","DOI":"10.1007\/s00113-005-0957-5","article-title":"Quadrizepssehnenruptur: Diagnostik Und Therapie Einer Seltenen Verletzung","volume":"108","author":"Ochman","year":"2005","journal-title":"Unfallchirurg"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"159","DOI":"10.1007\/s10195-008-0002-x","article-title":"Simultaneous Chronic Rupture of Quadriceps Tendon and Contra-Lateral Patellar Tendon in a Patient Affected by Tertiary Hyperparatiroidism","volume":"9","author":"Grecomoro","year":"2008","journal-title":"J. Orthop. Traumatol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"71","DOI":"10.21037\/atm.2019.01.58","article-title":"Quadriceps Tendinopathy: A Review-Part 1: Epidemiology and Diagnosis","volume":"7","author":"King","year":"2019","journal-title":"Ann. Transl. Med."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"192","DOI":"10.5435\/00124635-200305000-00006","article-title":"Quadriceps Tendon Rupture","volume":"11","author":"Ilan","year":"2003","journal-title":"J. Am. Acad. Orthop. Surg."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"e21","DOI":"10.2106\/JBJS.RVW.21.00171","article-title":"Acute Quadriceps Tendon Rupture: Presentation, Diagnosis, and Management","volume":"10","author":"Arnold","year":"2022","journal-title":"JBJS Rev."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1031","DOI":"10.2214\/ajr.159.5.1414770","article-title":"MR Imaging of Quadrizeps Tendon: Normal Layered Configuration and Its Impartance in Cases of Tendon Rupture","volume":"159","author":"Zeiss","year":"1992","journal-title":"Am. J. Roentgenol."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"3297","DOI":"10.1007\/s11999-009-1052-y","article-title":"Clinical Anatomy of the Quadriceps Femoris and Extensor Apparatus of the Knee","volume":"467","author":"Waligora","year":"2009","journal-title":"Clin. Orthop. Relat. Res."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"805","DOI":"10.7863\/ultra.34.5.805","article-title":"Sonography of Traumatic Quadriceps Tendon Tears with Surgical Correlation","volume":"34","author":"Foley","year":"2015","journal-title":"J. Ultrasound. Med."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"e20","DOI":"10.2106\/JBJS.RVW.20.00096","article-title":"Management of Chronic Quadriceps Tendon Rupture: A Critical Analysis Review","volume":"9","author":"Elattar","year":"2021","journal-title":"JBJS Rev."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"7674","DOI":"10.1007\/s00330-021-07912-y","article-title":"MR Imaging of the Quadriceps Femoris Tendon: Distal Tear Characterization and Clinical Significance of Rupture Types","volume":"31","author":"Falkowski","year":"2021","journal-title":"Eur. Radiol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1186\/s13018-021-02696-9","article-title":"Complex Ruptures of the Quadriceps Tendon: A Systematic Review of Surgical Procedures and Outcomes","volume":"16","author":"Oliva","year":"2021","journal-title":"J. Orthop. Surg. Res."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"3833","DOI":"10.1080\/09638288.2019.1611951","article-title":"Gait Analysis and Body Composition after Treatment of Quadriceps Tendon Ruptures Showed Equal Results Independent of Suture Anchor or Transosseus Repair Technique Used: A Pilot Study","volume":"42","author":"Hasenoehrl","year":"2020","journal-title":"Disabil. Rehabil."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"224","DOI":"10.32098\/mltj.02.2016.09","article-title":"Outcomes after Quadriceps Tendon Repair in Patients over 80 Years of Age","volume":"6","author":"Ellanti","year":"2016","journal-title":"Muscles Ligaments Tendons J."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"600","DOI":"10.1177\/03635465010290051301","article-title":"Development and Validation of the International Knee Documentation Committee Subjective Knee Form","volume":"29","author":"Irrgang","year":"2001","journal-title":"Am. J. Sport. Med."},{"key":"ref_18","unstructured":"Noyes, F.R., and Barber-Westin, S.D. (2010). Noyes\u2019 Knee Disorders: Surgery, Rehabilitation, Clinical Outcomes, W.B. Saunders."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"543","DOI":"10.1007\/s001130050448","article-title":"Blutgef\u00e4\u00dfversorgung Der Quadrizepssehne","volume":"102","author":"Petersen","year":"1999","journal-title":"Unfallchirurg"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"194","DOI":"10.1016\/j.ijantimicag.2008.08.004","article-title":"Quinolone-Induced Arthropathy: An Update Focusing on New Mechanistic and Clinical Data","volume":"33","author":"Sendzik","year":"2009","journal-title":"Int. J. Antimicrob. Agents"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"959","DOI":"10.1007\/s00132-021-04178-6","article-title":"Quadrizepssehnenruptur","volume":"50","author":"Petersen","year":"2021","journal-title":"Orthopade"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"884","DOI":"10.2106\/00004623-199072060-00014","article-title":"Vascularity of the Posterior Tibial Tendon","volume":"72","author":"Frey","year":"1990","journal-title":"J. Bone Jt. Surg. Am."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"115","DOI":"10.2214\/ajr.165.1.7785569","article-title":"Correlation of MR Imaging and Pathologic Findings in Athletes Undergoing Surgery for Chronic Patellar Tendinitis","volume":"165","author":"Yu","year":"1995","journal-title":"AJR Am. J. Roentgenol."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"633","DOI":"10.1007\/s00167-008-0516-z","article-title":"Intra-Articular Knee Injuries in Patients with Knee Extensor Mechanism Ruptures","volume":"16","author":"McKinney","year":"2008","journal-title":"Knee Surg. Sport. Traumatol. Arthrosc."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1592","DOI":"10.2106\/JBJS.O.00113","article-title":"Extensor Mechanism Injuries of the Knee: Demographic Characteristics and Comorbidities from a Review of 726 Patient Records","volume":"97","author":"Garner","year":"2015","journal-title":"JBJS"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"384","DOI":"10.1530\/EOR-22-0021","article-title":"Extensor Mechanism Ruptures","volume":"7","author":"Tandogan","year":"2022","journal-title":"EFORT Open Rev."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1177\/23259671221097107","article-title":"Outcomes After Repair of Quadriceps Tendon Rupture in Patients Aged 40 Years and Younger","volume":"10","author":"Rao","year":"2022","journal-title":"Orthop. J. Sport. Med."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1016\/j.otsr.2013.09.014","article-title":"Acute Quadriceps Tendon Ruptures: A Series of 50knees with an Average Follow-up of More than 6 Years","volume":"100","author":"Boudissa","year":"2014","journal-title":"Orthop. Traumatol. Surg. Res."}],"container-title":["Journal of Personalized Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2075-4426\/13\/2\/364\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T18:36:16Z","timestamp":1760121376000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2075-4426\/13\/2\/364"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,2,18]]},"references-count":28,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2023,2]]}},"alternative-id":["jpm13020364"],"URL":"https:\/\/doi.org\/10.3390\/jpm13020364","relation":{},"ISSN":["2075-4426"],"issn-type":[{"value":"2075-4426","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,2,18]]}}}