The oblique talus deformity. What is it, and what is its clinical significance in the scheme of pronatory deformities?

The advantage for maintaining oblique talus deformity as a diagnostic entity is obvious. It describes a deformity that is somewhere between the severe form of flexible pes planus and congenital convex pes valgus. It is important to recognize that the two subsets (oblique talus deformity with maintenance of the calcaneal inclination angle and oblique talus deformity with reversal of the calcaneal inclination) differ from congenital convex pes valgus by the absence of dislocation of the talonavicular joint. In many cases, the talonavicular joint is merely pushed to its maximum range, and does not even meet the definition of subluxation. Maintaining these distinctions prevents overdiagnosis of congenital convex pes valgus. Additionally, better evaluation of treatment for congenital convex pes valgus results because those cases with better prognosis and better response to nonsurgical intervention are not included in the data for the management of congenital convex pes valgus.