Danis–Weber classification

The Danis–Weber classification is a method of describing ankle fractures. It has three types: A, B, and C, based upon the location of fracture of the distal fibula.

Types

;Type A
Fracture of the fibula distal to the tibiofibular syndesmosis. Typical features:

;Type B
Fracture of the fibula at the level of the syndesmosis. Typical features:

at the level of the ankle joint, extending superiorly and laterally up the fibula
tibiofibular syndesmosis intact or only partially torn, but no widening of the distal tibiofibular articulation
medial malleolus may be fractured or deltoid ligament may be torn
variable stability

;Type C
Fracture of the fibula proximal to the syndesmosis. Typical features:

above the level of the ankle joint
tibiofibular syndesmosis disrupted with widening of the distal tibiofibular articulation
medial malleolus fracture or deltoid ligament injury present
unstable: requires ORIF

Categories B and C imply a degree of damage to the syndesmosis itself. They are inherently unstable and are more likely to require operative repair to achieve a good outcome. Type A fractures are usually stable and can be managed with simple measures, such as a plaster of paris cast.