Congenital absence of the fibula

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Congenital absence of the fibula is a congenital disorder where in one or both legs there is a fibrous band instead of the fibula. The result tends to be:

Short deformed leg
Absence of part of the ankle joint, and what is left is unstable; the foot has an equinovalgus deformity.
Absence of part of the foot.

Sometimes the foot can be brought into normal function; sometimes it must be amputated.