[Remarks on classification of Perthes disease]

The most commonly used classifications of Perthes disease are presented., their pros and cons discussed. The newest classification of Perthes disease proposed by Herring et al in 1992 is included. The ease of interpretation of the a-p hip radiographs, high reproducibility of the method and strict correlation between lateral pillar height and the final result of treatment make Herring's classification very useful. Its wide utilization may allow for uniform treatment of Perthes disease.