title: [Dizygotic twins, the one 47 XX 21+ and clinically mongolian, the other one 46 XX-47 XX 21+ and clinically not mongolian].
mesh_terms: D004200:Diseases in Twins; D004314:Down Syndrome; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009030:Mosaicism; D014314:Trisomy
vernacular_title: Jumeaux dizygotes, l'un 47 XX 21+ et cliniquement mongolien, l'autre 46 XX-47 XX 21+ et cliniquement non mongolien.