A combination of an ankle sprain involving the deltoid ligament and a fracture of the proximal fibula. It occurs, for example, when a skier falls on the ankle and rotational forces twist the tibia on the talus. The forces are so great that their damaging effects extend from the ankle up the interosseus membrane to fracture the proximal fibula. Maisonneuve's fracture results in the ankle being very unstable. Surgery is usually required to fix the instability. A Maisonneuve's fracture should always be suspected if a medial ankle sprain is accompanied by tenderness high up the fibula. These injuries are seen in less than 2% of all ankle sprains.
Subjects: Sports and Exercise Medicine.