DOCK8 and Cri-du-chat syndrome: For fetus 20, SNP array analysis revealed a 32 Mb deletion at 5p15.33p13.3 (involving CTNND2 and DOCK8) which caused cri-du-chat syndrome, and a 21 Mb duplication at 9p24.3p21.3 (involving KANK1) leading to 9p duplication syndrome.