page_title: Danis–Weber classification
hierarchical_section_title: Danis–Weber classification
caption_attribution_description: English: Danis–Weber classification on X-ray.
context_page_description: The Danis–Weber classification is a method of describing ankle fractures. It has three categories:
  Type A
  Fracture of the lateral malleolus distal to the syndesmosis. Typical features:
  below level of the ankle joint
  tibiofibular syndesmosis intact
  deltoid ligament intact
  medial malleolus occasionally fractured
  usually stable: occasionally nonetheless requires an open reduction and internal fixation particularly if medial malleolus fractured
  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.
context_section_description: The Danis–Weber classification (often known just as the Weber classification) is a method of describing ankle fractures. It has three categories:
  Type A
  Fracture of the lateral malleolus distal to the syndesmosis (the connection between the distal ends of the tibia and fibula). Typical features:
  below level of the ankle joint
  tibiofibular syndesmosis intact
  deltoid ligament intact
  medial malleolus occasionally fractured
  usually stable: occasionally nonetheless requires an open reduction and internal fixation (ORIF) particularly if medial malleolus fractured
  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 (which cannot be directly visualised on X-ray). 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.
caption: Danis–Weber classification on X-ray.
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