Question 1618
{"accessible":true,"alternatives":[{"id":8058,"text":"decreased trochlear depth"},{"id":8060,"text":"increased TT-TG distance"},{"id":8059,"text":"loose intraarticular chondral fragments"},{"id":8061,"text":"medial collateral ligament tear"},{"id":8057,"text":"osteochondral injury of the lateral femoral condyle"}],"archived":false,"correctAlternativeId":8061,"explanation":"\u003cp\u003eThe imaging findings are those of \u003ca href=\"/articles/lateral-patellar-dislocation\"\u003elateral patellar dislocation\u003c/a\u003e.\u003c/p\u003e\u003cp\u003e\u003ca href=\"/articles/medial-collateral-ligament-tear\"\u003eMedial collateral ligament tear\u003c/a\u003e is \u003cstrong\u003enot\u003c/strong\u003e directly associated with lateral patellar dislocation, thus this is the correct answer. Instead, it is the \u003ca href=\"/articles/medial-patellofemoral-ligament\"\u003emedial patellofemoral ligament\u003c/a\u003e that is usually torn.\u003c/p\u003e\u003cp\u003e\u003ca href=\"/articles/osteochondral-injury-staging\"\u003eOsteochondral injury\u003c/a\u003e of the lateral femoral condyle and \u003ca href=\"/articles/intra-articular-loose-bodies-2\"\u003eloose intraarticular chondral fragments\u003c/a\u003e are known associated findings in the settting of \u003ca href=\"/articles/lateral-patellar-dislocation\"\u003elateral patellar dislocation\u003c/a\u003e, and should be looked out for.\u003c/p\u003e\u003cp\u003eDecreased \u003ca href=\"/articles/trochlear-depth-td\"\u003etrochlear depth\u003c/a\u003e indicates \u003ca href=\"/articles/trochlear-dysplasia\"\u003etrochlear dysplasia\u003c/a\u003e, a known risk facor for \u003ca href=\"/articles/patellofemoral-instability\"\u003epatellofemoral instability\u003c/a\u003e. Increased \u003ca href=\"/articles/patellar-translation-tt-tg-distance\"\u003etibial tuberosity-trochlear groove (TT-TG) distance\u003c/a\u003e is another risk factor.\u003c/p\u003e","id":1618,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/144/Lateral_patellar_dislocation_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":76304},"imageAttributionCaseInfo":{"title":"Patellar dislocation with chondral injury","contributor_name":"Joachim Feger","contributor_param":"jfeger","case_rid":76304,"case_param":"patellar-dislocation-with-chondral-injury"},"firstQuestionPath":"/questions/1618","nextQuestionPath":null,"relatedArticles":[{"id":63295,"title":"Osteochondral fracture","link":"/articles/osteochondral-fracture?lang=us"},{"id":10926,"title":"Medial collateral ligament injury grading","link":"/articles/medial-collateral-ligament-injury-grading?lang=us"},{"id":77549,"title":"Trochlear dysplasia","link":"/articles/trochlear-dysplasia?lang=us"},{"id":75391,"title":"Medial patellofemoral ligament","link":"/articles/medial-patellofemoral-ligament?lang=us"},{"id":27273,"title":"Lateral patellar dislocation","link":"/articles/lateral-patellar-dislocation?lang=us"},{"id":44662,"title":"Tibial tuberosity to trochlear groove distance (TT-TG distance)","link":"/articles/tibial-tuberosity-to-trochlear-groove-distance-tt-tg-distance?lang=us"},{"id":16281,"title":"Patellofemoral instability","link":"/articles/patellofemoral-instability?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eA 20-year-old female presents with pain and swelling of the knee after trauma.\u0026nbsp;Which of the following findings is \u003cstrong\u003eleast \u003c/strong\u003eexpected in an injury like the one depicted in the image?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1618"}],"attemptsPercentages":[{"alternativeId":"8058","percentage":13},{"alternativeId":"8057","percentage":17},{"alternativeId":"8060","percentage":11},{"alternativeId":"8059","percentage":8},{"alternativeId":"8061","percentage":52}],"promptToLogin":false,"questionManager":false,"articleId":"intra-articular-loose-bodies"}