Images in emergency medicine
Article Outline
A 39-year-old man fell off his bicycle at low speed when he slipped on sand. He landed on his left side, somehow catching his knee, perhaps involving a valgus strain. There was difficulty in attempting to walk, and he immediately noticed a lump lateral to the knee (Figure 1). There was no knee effusion, no other injury, and no neurologic impairment. Radiograhs were taken (Figure 2, Figure 3, Figure 4).
Figure 1.
Dislocation of the proximal left tibiofibular joint.
Figure 2.
Anteroposterior radiograph of the knee. The fibular head is noted to be laterally displaced.
Figure 3.
The lateral radiograph does not readily demonstrate the abnormality.
Figure 4.
Axial computed tomographic scan of both knees demonstrates the left fibular head (large arrow) to be anterolaterally dislocated from its articulation with the left tibia (small arrow). Used with permission of Daniel M. Fatovich, MBBS, FACEM, University of Western Australia, and Department of Emergency Medicine, Royal Perth Hospital, Perth, Western Australia, Australia.
PII: S0196-0644(06)00400-8
doi:10.1016/j.annemergmed.2006.03.006
© 2006 American College of Emergency Physicians. Published by Elsevier Inc. All rights reserved.
