There are subtle findings which indicate a fracture of the posterior malleolus. The fracture is classified according to Weber as a type B fracture.Īccording to Lauge Hansen the oblique fibular fracture indicates that this is a Supination Exorotation injury stage 2 or higher. Sometimes CT is needed to get a better impression of the size of the fracture fragment of the posterior malleolus.įracture of the lateral malleolus starting anteriorly at the level of the joint extending proximally posteriorly. The size of the posterior malleolar fragment is probably less than 25% of the articular AP-diameter and will need no separate repair. This is an unstable fracture with dislocation that needs surgical repair. Only now you notice the posterior malleolar fracture on the lateral view. Look for stage 3 (posterior syndesmotic rupture or avulsion of the posterior malleolus) and stage 4 (rupture of the deltoid ligament or medial malleolar avulsion). a Weber B fracture.Īccording to Lauge Hansen the oblique fibular fracture indicates Supination Exorotation injury stage 2 or higher. The fracture starts at the level of the ankle joint and extends proximally, i.e. The lateral malleolus is 'pushed off' from anterior to posterior. Avulsion fracture of the medial malleolar.
#Lateral malleolus of fibula how to#
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