Posterior cruciate ligament avulsion fracture
Contusive trauma with hyperextension of the right leg.
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Irregularity of the posterior tibial fovea, associated with avulsion of bone fragments: the signs are related to avulsion fracture of the posterior cruciate ligament. A moderate periarticular fluid effusion is present, most evident in the retropatellar recess.
Incidental coexisting Baker's cyst.
CT is useful to detect avulsion fractures of the posterior cruciate ligament and the complications arising from that condition. In this case, CT images show avulsion of bone fragments from the posterior tibial fovea, periarticular fluid effusion, and an incidental Baker's cyst.
- Gottsegen CJ, Eyer BA, White EA et-al. Avulsion fractures of the knee: imaging findings and clinical significance. Radiographics. 2008;28 (6): 1755-70. doi:10.1148/rg.286085503