Maisonneuve fracture

Maisonneuve fracture. The obvious abnormality on this AP ankle radiograph is the subluxed ankle joint, which has occurred as a result of a tear of the deltoid ligament (which has avulsed a small bone fragment from the talus, red arrow). However, whenever you see this injury, be careful not to miss the fracture of the proximal fibula that is often associated with it (yellow arrow). This pattern of injury is called a Maisonneuve fracture. It can also occur with fractures of the medial malleolus or the posterior lip of the distal tibia.