Cinquantenaire de la trisomie 21 : Retour sur une découverte
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Fifty years ago, I was co-author of the first paper asserting the presence of a supernumerary chromosome in Down’s syndrome (called « mongolism » in France at that time). This first autosomal chromosomal abnormality was called Trisomy 21. It seemed to me historically interesting to bring my own testimony as an actor in this discovery.