1 Department of Meical Genetics New York State Psychiatric Institute, Columbia University
2 Research Department, Letchworth Village
3 Division Human Genetics, Georgia Mental Health Institute, Emory University
We should like to thank Drs. Opitz and Smith for their detailed commentary on our report of chromosome anomalies in a large pedigree with de Lange syndrome. It is certainly most kind of them to postulate that our patients represent a new multiple anomaly. However, whether or not all cases of de Lange syndrome have a common etiology is at present unknown, and it would be most presumptuous of us to assume that our cases compose an entirely new disorder.