Open AccessPosterolateral dislocation of the knee: Recognizing an uncommon entity
Author(s) -
Colin Yi-Loong Woon,
Mark R. Hutchinson
Publication year - 2016
Publication title -
world journal of orthopedics
Language(s) - English
Resource type - Journals
ISSN - 2218-5836
DOI - 10.5312/wjo.v7.i6.401
Subject(s) - medicine , reduction (mathematics) , knee dislocation , pathognomonic , ankle , surgery , soft tissue , magnetic resonance imaging , radiography , radiology , orthopedic surgery , pathology , geometry , mathematics , disease
Posterolateral dislocations of the knee are rare injuries. Early recognition and emergent open reduction is crucial. A 48-year-old Caucasian male presented with right knee pain and limb swelling 3 d after sustaining a twisting injury in the bathroom. Examination revealed the pathognomonic anteromedial "pucker" sign. Ankle-brachial indices were greater than 1.0 and symmetrical. Radiographs showed a posterolateral dislocation of the right knee. He underwent emergency open reduction without an attempt at closed reduction. Attempts at closed reduction of posterolateral dislocations of the knee are usually impossible because of incarceration of medial soft tissue in the intercondylar notch and may only to delay surgical management and increase the risk of skin necrosis. Magnetic resonance imaging is not crucial in the preoperative period and can lead to delays of up to 24 h. Instead, open reduction should be performed once vascular compromise is excluded.