title: Cytogenetic analysis in the Langdon-Down syndrome (with reference to 8 cases).
mesh_terms: D002869:Chromosome Aberrations; D005260:Female; D006801:Humans; D007223:Infant; D008607:Intellectual Disability; D007621:Karyotyping; D008297:Male; D012728:Sex Chromatin / Q000032:analysis*