What are the findings?
There are two proximal fibular fractures and an avulsion of the anterior tibial eminence
Based on the location of the tibial eminence fracture, what structure is involved with this pattern of fracture and what is a possible mechanism?
ACL avulsion, likely due to a hyperextension mechanism. This makes sense because this was the leg that was extended while driving as it was on the gas pedal at the time of collision.
Describe the anatomy of the anterior cruciate ligament.
The ACL arises from the anteromedial aspect of the intercondylar area on the tibial plateau and passes upwards and backwards to attach to the medial aspect of the lateral femoral condyle. Intracapsular but extrasynovial. Consists of two bundles - anteromedial and posterolateral.
There are two proximal fibular fractures involving the fibular head and proximal fibular diaphysis, as well as an avulsion of the anterior tibial eminence. A large suprapatellar effusion is also noted, with a fat/fluid level.