{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T07:47:08Z","timestamp":1792136828845,"version":"4.4.0"},"reference-count":6,"publisher":"BMJ","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["BMJ Case Reports"],"abstract":"<jats:p>We report three cases of adolescent boys with mild diplegic cerebral palsy (CP) who suffered disruption of the knee extensor mechanism. Two had fractures of the patella and the third a fracture avulsion of the tibial tubercle combined with an undisplaced fracture of the patella. All three had gait analysis prior to sustaining the fractures and were known to have mild knee crouch. Each participated in sport including football. Each suffered an acute deterioration in gait resulting in a referral for repeat gait analysis, and x-ray of the affected knee. With the increased involvement of children with CP in sporting activities, especially children with mild knee crouch, we caution that knee extensor rupture might be an increasing problem.<\/jats:p>","DOI":"10.1136\/bcr-2012-008120","type":"journal-article","created":{"date-parts":[[2013,2,21]],"date-time":"2013-02-21T02:08:12Z","timestamp":1361412492000},"page":"bcr2012008120","source":"Crossref","is-referenced-by-count":9,"title":["Knee extensor disruption in mild diplegic cerebral palsy: a risk for adolescent athletes"],"prefix":"10.1136","volume":"2013","author":[{"given":"Yahya","family":"Elhassan","sequence":"first","affiliation":[{"name":"Department of Gait Laboratory, Central Remedial Clinic, Dublin, Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rory","family":"O'Sullivan","sequence":"additional","affiliation":[{"name":"Department of Gait Laboratory, Central Remedial Clinic, Dublin, Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mike","family":"Walsh","sequence":"additional","affiliation":[{"name":"Department of Gait Laboratory, Central Remedial Clinic, Dublin, Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tim","family":"O Brien","sequence":"additional","affiliation":[{"name":"Department of Gait Laboratory, Central Remedial Clinic, Dublin, Ireland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2013,2,20]]},"reference":[{"key":"2025082703210060000_2013.feb20_1.bcr2012008120.1","doi-asserted-by":"crossref","first-page":"567","DOI":"10.1097\/01241398-199309000-00002","article-title":"Fractures of the patella in children and adolescents","volume":"13","author":"Maguire","year":"1993","journal-title":"J Pediatr Orthop"},{"key":"2025082703210060000_2013.feb20_1.bcr2012008120.2","doi-asserted-by":"crossref","first-page":"721","DOI":"10.1097\/01241398-199011000-00004","article-title":"Avulsion fractures of the patella","volume":"10","author":"Grogan","year":"1990","journal-title":"J Pediatr Orthop"},{"key":"2025082703210060000_2013.feb20_1.bcr2012008120.3","doi-asserted-by":"publisher","DOI":"10.1002\/ca.20976"},{"key":"2025082703210060000_2013.feb20_1.bcr2012008120.4","doi-asserted-by":"crossref","first-page":"934","DOI":"10.2106\/00004623-197759070-00017","article-title":"Fragmentation of the distal pole of the patella in spastic cerebral palsy","volume":"59","author":"Rosenthal","year":"1977","journal-title":"J Bone Joint Surg Am"},{"key":"2025082703210060000_2013.feb20_1.bcr2012008120.5","doi-asserted-by":"crossref","first-page":"636","DOI":"10.1097\/01241398-200009000-00016","article-title":"Radiographic abnormalities and clinical symptoms associated with patella alta in ambulatory children with cerebral palsy","volume":"20","author":"Topoleski","year":"2000","journal-title":"J Pediatr Orthop"},{"key":"2025082703210060000_2013.feb20_1.bcr2012008120.6","doi-asserted-by":"crossref","first-page":"252","DOI":"10.1302\/0301-620X.67B2.3980536","article-title":"Avulsion of the distal pole of the patella in cerebral palsy. A cause of deteriorating gait","volume":"67","author":"Lloyd-Roberts","year":"1985","journal-title":"J Bone Joint Surg Br"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2012-008120","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T10:21:09Z","timestamp":1756290069000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2012-008120"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2013,2,20]]},"references-count":6,"alternative-id":["10.1136\/bcr-2012-008120"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2012-008120","relation":{},"ISSN":["1757-790X"],"issn-type":[{"value":"1757-790X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2013,2,20]]}}}