Lab Studies:
Right knee x-ray showed a cortical avulsion fracture of the lateral tibial plateau, mild trochlear dysplasia, open growth plates, and a moderate suprapatellar effusion. <a href="CaseStudyImages/CS1OnSegondThoughtNo-1029.jpg" title="Case Photo #1" data-lity><b>Case Photo #1</b></a> : Segond fracture. <a href="CaseStudyImages/CS2OnSegondThoughtNo-1029.jpg" title="Case Photo #2" data-lity><b>Case Photo #2</b></a> : Trochlear dysplasia.
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<br>Right knee magnetic resonance imaging demonstrated an osteochondral injury to the anterolateral distal femur and a displaced chondral fragment into the lateral recess of the suprapatellar knee joint. A large suprapatellar knee joint effusion was noted. The medial retinaculum, cruciate ligaments (ACL and PCL), collateral ligaments, and menisci were intact. <a href="CaseStudyImages/CS3CS2OnSegondThough-1029.jpg" title="Case Photo #3" data-lity><b>Case Photo #3</b></a> : Anterior cruciate ligament intact with large effusion. Sagittal T1 view. <a href="CaseStudyImages/CS4CS3CS2OnSegondTho-1029.jpg" title="Case Photo #4" data-lity><b>Case Photo #4</b></a> : Displaced chondral fragment into the lateral recess. Axial T2 view. <a href="CaseStudyImages/CS5CS4CS3CS2OnSegond-1029.jpg" title="Case Photo #5" data-lity><b>Case Photo #5</b></a> : Possible patellar donor site. Sagittal T1 view.
Other Studies:
No other studies were obtained.
Consultations:
The patient was referred to orthopedic surgery where a more focused history revealed that her current presentation was not a primary dislocation event.
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