The subgroups represent a variation within the group and the one illustrated is indicated with red in the text.
A1 Simple fracture, spiral
.1 fibula intact
.2 fibula fractured at another level
.3 fibula fractured at the same level
A2 Simple fracture, oblique (> or = 30°)
.1 fibula intact
.2 fibula fractured at another level
.3 fibula fractured at the same level
A3 Simple fracture, transverse (< 30°)
.1 fibula intact
.2 fibula fractured at another level
.3 fibula fractured at the same level
B1 Wedge fracture, spiral wedge
.1 fibula intact
.2 fibula fractured at another level
.3 fibula fractured at the same level
B2 Wedge fracture, bending wedge
.1 fibula intact
.2 fibula fractured at another level
.3 fibula fractured at the same level
B3 Wedge fracture, fragmented wedge
.1 fibula intact
.2 fibula fractured at another level
.3 fibula fractured at the same level
C1 Complex fracture, spiral
.1 with two intermediate fragments
.2 with three intermediate fragments
.3 with more than three intermediate fragments
C2 Complex fracture, segmental
.1 with one intermediate segmental fragment
.2 with one intermediate segmental and additional wedge fragment
.3 with two intermediate segmental fragments
C3 Complex fracture, irregular
.1 with two or three intermediate fragments
.2 with limited shattering (< 4 cm)
.3 with extensive shattering (> or = 4 cm)