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Weber ankle fracture

Danis–WeberXRTrauma
Figure · click to enlarge
Weber A, B and C relative to the syndesmosis. Image: Frank Gaillard, Radiopaedia.org, CC BY-NC-SA

Based on the level of the distal fibular fracture relative to the tibiofibular syndesmosis.

TypeFibular fracture levelSyndesmosis
ABelow the syndesmosis (infrasyndesmotic)Intact. Usually stable
BAt the level of the syndesmosis, often spiralVariable; assess medial clear space
CAbove the syndesmosisDisrupted. Unstable

Pearls

  • Medial clear space >4 mm (or wider than superior clear space) indicates deltoid injury and instability.
  • Weber C with proximal fibular fracture and syndesmotic/medial injury = Maisonneuve; image the whole fibula.

Sources

  1. Weber BG. Die Verletzungen des oberen Sprunggelenkes. 2nd ed. Bern: Huber; 1972.
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Radessential summarizes published classification systems for practicing radiologists. Summaries are condensed; confirm details against the cited source before relying on them for patient care.