{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,17]],"date-time":"2025-09-17T16:45:01Z","timestamp":1758127501257,"version":"3.41.2"},"reference-count":36,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2021,1,21]],"date-time":"2021-01-21T00:00:00Z","timestamp":1611187200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Endocrinol."],"abstract":"<jats:sec><jats:title>Introduction<\/jats:title><jats:p>Injuries to the quadriceps extensor mechanism are rare in patients with Osteogenesis Imperfecta (OI). To the best of our knowledge, non-union of the patella in OI, either as an isolated problem or in combination with an acute fracture, has not been previously reported.<\/jats:p><\/jats:sec><jats:sec><jats:title>Case report<\/jats:title><jats:p>We describe how we surgically approached both the fracture and the non-union simultaneously. The surgical technique and steps are described in detail. Post-operative course was uneventful and the outcome was favorable, with full return of function for the patient.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>A review of various knee extensor mechanism injuries in OI is described as illustrated in a single patient. The unusual simultaneous surgical treatment of a non-union and an acute fracture in the same patella shows that despite the severely compromised bone in this rare bone disease the bone still has a capacity to heal with a functional outcome.<\/jats:p><\/jats:sec>","DOI":"10.3389\/fendo.2020.603638","type":"journal-article","created":{"date-parts":[[2021,1,21]],"date-time":"2021-01-21T07:51:37Z","timestamp":1611215497000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":3,"title":["Plethora of Traumatic Lesions of Bilateral Knee Extensor Mechanism in Osteogenesis Imperfecta"],"prefix":"10.3389","volume":"11","author":[{"given":"Peter","family":"Kloen","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Reggie Charles","family":"Hamdy","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Niels Hendrik","family":"Bech","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2021,1,21]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1159\/000332228","article-title":"Osteogenesis Imperfecta: A Review with Clinical Examples","volume":"2","author":"van Dijk","year":"2011","journal-title":"Mol Syndromol"},{"key":"B2","doi-asserted-by":"publisher","DOI":"10.1002\/ajmg.a.36545","article-title":"Osteogenesis imperfecta: clinical diagnosis, nomenclature and severity assessment","author":"van Dijk","year":"2014","journal-title":"Am J Med Genet A"},{"key":"B3","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(15)00728-X","article-title":"Osteogenesis imperfecta","volume":"387","author":"Forlino","year":"2016","journal-title":"Lancet (London England)"},{"key":"B4","doi-asserted-by":"publisher","DOI":"10.1038\/nrendo.2011.81","article-title":"New perspectives on osteogenesis imperfecta","volume":"7","author":"Forlino","year":"2011","journal-title":"Nat Rev Endocrinol"},{"key":"B5","doi-asserted-by":"publisher","first-page":"17052","DOI":"10.1038\/nrdp.2017.52","article-title":"Osteogenesis imperfecta","volume":"3","author":"Marini","year":"2017","journal-title":"Nat Rev Dis Prim"},{"key":"B6","doi-asserted-by":"publisher","first-page":"298","DOI":"10.5435\/JAAOS-D-15-00275","article-title":"Orthopaedic Considerations for the Adult With Osteogenesis Imperfecta","volume":"24","author":"Roberts","year":"2016","journal-title":"J Am Acad Orthop Surg"},{"key":"B7","doi-asserted-by":"publisher","DOI":"10.3389\/fendo.2019.00924","article-title":"Management of Osteogenesis Imperfecta","volume":"10","author":"Ralston","year":"2019","journal-title":"Front Endocrinol (Lausanne)"},{"key":"B8","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2010.03.005","article-title":"Treatment of chronic disruption of the patellar tendon in Osteogenesis Imperfecta with allograft reconstruction","volume":"18","author":"ElGuindy","year":"2011","journal-title":"Knee"},{"key":"B9","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcot.2020.01.013","article-title":"Tibial-tubercle avulsion and patellar-tendon rupture in pre-pubertal child with osteogenesis imperfecta(OI): Case report and review of current treatment in OI","volume":"11","author":"Mehta","year":"2020","journal-title":"J Clin Orthop Trauma"},{"key":"B10","doi-asserted-by":"publisher","DOI":"10.4055\/jkoa.2016.51.5.432","article-title":"Simultaneous Bilateral Patellar Tendon Ruptures Associated with Osteogenesis Imperfecta","volume":"51","author":"Kim","year":"2016","journal-title":"J Korean Orthop Assoc"},{"key":"B11","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-011-1595-9","article-title":"Distal patellar tendon avulsion fracture in a football player with osteogenesis imperfecta","volume":"20","author":"Jansen","year":"2012","journal-title":"Knee Surg Sports Traumatol Arthrosc"},{"key":"B12","doi-asserted-by":"publisher","DOI":"10.1016\/s0020-1383(02)00201-2","article-title":"Sleeve fracture of the upper pole of the patella in an adult with osteogenesis imperfecta","volume":"34","author":"Kakazu","year":"2003","journal-title":"Injury"},{"key":"B13","doi-asserted-by":"publisher","DOI":"10.1097\/00005131-199112000-00015","article-title":"Type III fractures of the tibial tubercle in adolescents","volume":"5","author":"Wiss","year":"1991","journal-title":"J Orthop Trauma"},{"key":"B14","article-title":"Case report. 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