Fibular pachydysostosis: an atypical case.

Pachydysostosis of the fibula is an isolated deformity of the fibula with bowing and lengthening. Only one report has appeared in the literature, describing four lesions which underwent spontaneous regression during early childhood; no therapy was recommended. We report a 12-year-old boy with this type of deformity, who developed progressive angulation and deformation of the ankle joint. An osteotomy was necessary to realign the fibula. One year later the patient was free of symptoms.