Monosomy for the centromeric and juxtacentromeric region of chromosome 21.
D000015:Abnormalities, Multiple / Q000235:genetics*; D000782:Aneuploidy; D002904:Chromosomes, Human, 21-22 and Y / Q000648:ultrastructure*; D005532:Foot Deformities, Congenital; D006579:Heterozygote; D006801:Humans; D007231:Infant, Newborn; D007621:Karyotyping; D008214:Lymphocytes / Q000648:ultrastructure; D008297:Male; D008831:Microcephaly / Q000235:genetics; D008850:Microphthalmos / Q000235:genetics; D010641:Phenotype; D013194:Staining and Labeling; D014178:Translocation, Genetic