[Trisomy 21 and trisomy 18 in siblings].
D000015:Abnormalities, Multiple; D000506:Alopecia Areata / Q000235:genetics; D002675:Child, Preschool; D002902:Chromosomes, Human, 16-18; D002904:Chromosomes, Human, 21-22 and Y; D003582:Cytogenetics; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006505:Hepatitis / Q000151:congenital; D006801:Humans; D007223:Infant; D007621:Karyotyping; D008423:Maternal Age; D009030:Mosaicism; D012886:Skull / Q000002:abnormalities; D013577:Syndrome; D014314:Trisomy
Trisomie 21 et trisomie 18 dans une même fratrie.