Dislocation of the proximal tibiofibular joint is a rare injury, probably less than 1% of all knee injuries. It is seen more frequently in athletes such as soccer players, ballet dancers, and equestrian jumpers. 2. Proximal tibiofibular dislocations are classified into four types: Type I, subluxations; Type II, anterolateral (the most common); Type III, posteromedial; and Type IV, superior. 3. Open reduction is preferred for acute instability or inability to achieve a closed reduction. Chronic instability may result in degeneration of the joint surfaces and is best treated by fibular head resection.
