Fig. 1

a Chorionic villus sampling: Array comparative genomic hybridization showed a 36.4 Mb duplication of the distal short arm of chromosome 10 (10p11.21pter) (left) and a normal chromosome 21 (middle). Chromosome analysis showed a derivate chromosome 21, der(21)t(10;21)(p.11.21;q10) (right). b Amniocentesis: Array comparative genomic hybridization showed a normal chromosome 10 (left) and a duplication of chromosome 21 (middle). Chromosome analysis showed a derivate chromosome 21, der(21;21)(q10;q10) (right)