title: Retardation in a child with an extra submetacentric chromosome fragment and partial mongolism.
mesh_terms: D001789:Blood Group Antigens; D002675:Child, Preschool; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D002874:Chromosome Mapping; D002903:Chromosomes, Human, 19-20; D002904:Chromosomes, Human, 21-22 and Y; D003878:Dermatoglyphics; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000209:etiology*; D007621:Karyotyping; D014314:Trisomy
chemical_list: D001789:Blood Group Antigens