1 Department of Medical Genetics, New York State Psychiatric Institute, New York City, and Research Department, Letchworth Village, Thiells, New York
Familial de Lange syndrome is described in three siblings and a maternal first cousin. A new chromosomal aberration has been found in this family in all affected children and in 7 unaffected carriers. Karyotypic differences between carriers and their affected children present evidence of an excess of some chromosome A 3 material producing the clinical disorder.
Submitted on May 21, 1965
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