Medial malleolus injuries to the ankle result from eversion forces. Depending on the direction and strength, forces may result in sprain or rupture of the deltoid ligament or fracture of the medial malleolus. These fractures are usually treated operatively. Force directed obliquely may result in a bimalleolar fracture.

A	Mortise view of the ankle. This demonstrates a minimally displaced fracture of the medial malleolus of the distal tibia.
B	AP radiograph of the ankle. A bimalleolar fracture is present.

Links to online textbooks:

• Wheeless' Orthopedics: discussion of medial malleolus injuries

Links to online cases:

• Network Medical Information Services

References:

• Kennedy JG, Johnson SM, Collins AL, DalloVedova P, McManus WF, Hynes DM, Walsh MG, Stephens MM: An evaluation of the Weber classification of ankle fractures Injury. 1998 Oct;29(8):577-80.           [See related articles]