Abstract
1. Congenital vertical talus is described and the criteria for diagnosis are emphasised. The need for its distinction from other forms of convex pes valgus is stressed.
2. The operative technique of Stone for Lloyd-Roberts (1963) is detailed and the results of seven such operations are examined.
3. Departure from the technique in any respect has resulted in an unsatisfactory outcome, whereas stringent observation of the operative details has resulted in uniformly good results in four patients.
4. Certain aspects of diagnosis, differential diagnosis, etiology, pathology and surgical management are discussed, together with a review of some of the relevant literature.