Congenital pseudoarthrosis and deficiencies of the tibia and fibula

Congenital deficiencies of long bones are subdivided by the Frantz-O’Rahilly classification (1961) into either terminal or intercalary deficiencies. Each type of deficiency is further subdivided into transverse or longitudinal. Tibial and fibular hemimelias may, therefore, be either terminal or intercalary paraxial deficiencies. This is reflected in the degree of the foot abnormality.