{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T12:09:19Z","timestamp":1774008559154,"version":"3.50.1"},"reference-count":45,"publisher":"BMJ","issue":"4","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2021,3,14]]},"published-print":{"date-parts":[[2021,4]]},"abstract":"<jats:p>Osteochondral defect or osteochondritis dissecans (OCD) of the knee usually affects young, active populations. It is a challenging diagnosis as patients typically present with poorly localised activity-related pain, which is non-specific and covers many differentials. We present an active 11-year-old girl with bilateral osteochondral defects of the patellae: a rare clinical disorder which was affecting her sporting activities. She had a 12-month history of bilateral anterior knee pain before the diagnosis was achieved with appropriate imaging. Her pain significantly improved with activity modification and physiotherapy. Follow-up will require outpatient clinic assessment and imaging to determine if non-operative management continues to be successful or surgery may be required. This case report emphasises the importance of appropriate high index of suspicion when managing patients with non-specific knee pain. It also demonstrates the importance of judicious use of imaging to avoid a missed or delayed diagnosis.<\/jats:p>","DOI":"10.1136\/bcr-2020-240790","type":"journal-article","created":{"date-parts":[[2021,4,23]],"date-time":"2021-04-23T10:43:40Z","timestamp":1619174620000},"page":"e240790","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":4,"title":["Bilateral osteochondral defects of the patellae in an 11-year-old girl"],"prefix":"10.1136","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0732-1072","authenticated-orcid":false,"given":"Miguel","family":"Rodriguez Ruiz","sequence":"first","affiliation":[{"name":"Trauma and Orthopaedics, Royal Free London NHS Trust, London, UK"},{"name":"University College London, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ibidumo","family":"Igah","sequence":"additional","affiliation":[{"name":"Trauma and Orthopaedics, Royal Free London NHS Trust, 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