Question 1878
{"accessible":false,"alternatives":[{"id":9328,"text":"KD I"},{"id":9329,"text":"KD II"},{"id":9330,"text":"KD III"},{"id":9331,"text":"KD IV"},{"id":9332,"text":"KD V"}],"archived":false,"correctAlternativeId":9329,"explanation":"\u003cp\u003eThe\u003cstrong\u003e\u0026nbsp;Schenck classification\u0026nbsp;\u003c/strong\u003eof\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/knee-dislocation?lang=gb\"\u003eknee dislocation\u003c/a\u003e\u0026nbsp;is based on the pattern of ligament tears. The four major ligamentous stabilizers are the\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/anterior-cruciate-ligament?lang=gb\"\u003eanterior cruciate ligament (ACL)\u003c/a\u003e,\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/posterior-cruciate-ligament?lang=gb\"\u003eposterior cruciate ligament (PCL)\u003c/a\u003e,\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/medial-collateral-ligament-of-the-knee?lang=gb\"\u003emedial collateral ligament (MCL)\u003c/a\u003e\u0026nbsp;and the\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/lateral-collateral-ligament-of-the-knee?lang=gb\"\u003elateral collateral ligament (LCL) complex\u003c/a\u003e.\u003c/p\u003e\u003cp\u003eFive patterns of major injuries are seen in knee dislocations (KD), according to the Schenck classification, each designated by a Roman numeral, from I to V.\u0026nbsp;\u003c/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKD I\u003c/strong\u003e:\u0026nbsp;involvement of the ACL or PCL\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKD II\u003c/strong\u003e: injury to both ACL and PCL, with both collaterals intact\u003cul\u003e\u003cli\u003erare\u003c/li\u003e\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKD III\u003c/strong\u003e: injury to both ACL and PCL, and MCL or LCL -\u0026nbsp;not both -\u0026nbsp;torn\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKDIIIM\u003c/strong\u003e\u0026nbsp;(if MCL torn)\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKDIIIL\u003c/strong\u003e\u0026nbsp;(if LCL torn)\u0026nbsp;\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKD IV\u003c/strong\u003e: all 4 ligaments torn\u003cul\u003e\u003cli\u003ehighest rate of vascular injury (5-15%)\u003c/li\u003e\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKD V\u003c/strong\u003e: multiligamentous injury with periarticular fracture\u003cul\u003e\u003cli\u003ei.e. knee fracture-dislocation\u003c/li\u003e\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\u003cp\u003eAdditional letter designators indicate the presence of neurovascular injury:\u003c/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eC\u003c/strong\u003e:\u0026nbsp;\u003ca href=\"https://radiopaedia.org/articles/popliteal-artery?lang=gb\"\u003epopliteal artery\u003c/a\u003e\u0026nbsp;injury\u003c/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eN\u003c/strong\u003e: peripheral nerve injury\u003cul\u003e\u003cli\u003eany deficit:\u0026nbsp;\u003ca title=\"neuropraxia\" class=\"internal\" href=\"/articles/neuropraxia\"\u003eneuropraxia\u003c/a\u003e, \u003ca title=\"neurotmesis\" class=\"internal\" href=\"/articles/neurotmesis\"\u003eneurotmesis\u003c/a\u003e, or \u003ca title=\"axonotmesis\" class=\"internal\" href=\"/articles/axonotmesis\"\u003eaxonotmesis\u003c/a\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https://radiopaedia.org/articles/common-peroneal-nerve?lang=gb\"\u003eperoneal nerve\u003c/a\u003e\u0026nbsp;(more common)\u003c/li\u003e\n\u003cli\u003e\u003ca href=\"https://radiopaedia.org/articles/tibial-nerve?lang=gb\"\u003etibial nerve\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e","id":1878,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1878","nextQuestionPath":null,"relatedArticles":[{"id":23201,"title":"Anterior cruciate ligament","link":"/articles/anterior-cruciate-ligament?lang=us"},{"id":31366,"title":"Medial collateral ligament of the knee","link":"/articles/medial-collateral-ligament-of-the-knee?lang=us"},{"id":31367,"title":"Lateral collateral ligament of the knee","link":"/articles/lateral-collateral-ligament-of-the-knee?lang=us"},{"id":65804,"title":"Schenck classification of knee dislocation","link":"/articles/schenck-classification-of-knee-dislocation?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eAccording to the\u0026nbsp;Schenck classification: in which type of knee dislocation (KD) is an injury of both ACL and PCL without the involvement of the collateral ligaments?\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/1878"}],"attemptsPercentages":[{"alternativeId":"9332","percentage":5},{"alternativeId":"9330","percentage":40},{"alternativeId":"9328","percentage":4},{"alternativeId":"9329","percentage":36},{"alternativeId":"9331","percentage":15}],"promptToLogin":false,"questionManager":false,"articleId":"posterior-cruciate-ligament"}