Brachmann-de Lange syndrome in sibs.

We report an Arab family of phenotypically normal first cousin parents with two offspring showing variable manifestations of Brachmann-de Lange syndrome. The proband, who had many diagnostic symptoms of the syndrome with apparently normal chromosomes, died at the age of three months. His sister was less severely affected and lived for six years. The genetic basis of Brachmann-de Lange syndrome is discussed and homozygosity for an autosomal recessive allelle is suggested as an underlying cause in some cases.