History: Middle aged male with ankle pain.
Malleolar fractures are classified mainly by two classification systems, the Weber system and the Lauge-Hansen system. There are three main types of Weber fractures (A,B, and C). The Lauge-Hansen system is much more complex and divides the fractures into their mechanisms, including supination/adduction, supination/external rotation, pronation/abduction, and pronation/external rotation. An excellent illustration of these classification systems can be found here.
Read more about ankle fractures here.