Isolated congenital pseudoarthrosis of the fibula.

Congenital pseudarthrosis of the limb most commonly involves the tibia, although various combinations of bones including fibula, radius, ulna, clavicle and humerus have all been described. Isolated congenital pseudarthrosis of the fibula is a very rare entity with only 12 cases reported in the English literature. We report three cases of this condition treated in our institution. The first child had a varus ankle deformity at the age of 4 months. The other two children presented with valgus ankle deformity after they started to walk. Two patients were treated conservatively while the third had a distal tibio-fibular fusion in view of severe valgus deformity. All three patients showed good early results after 1 to 2 years. We advocate early distal tibio-fibular fusion to prevent valgus deformity in these children.