title: Down's syndrome with additional XYY aneuploidy.
abstract: A further case of Down's syndrome with additional XYY aneuploidy is reported. The child has been followed for 5 years. It has not been possible to recognise any phenotypical feature which distinguishes the patient from others with Down's syndrome.
mesh_terms: D000782:Aneuploidy; D002675:Child, Preschool; D003878:Dermatoglyphics; D004314:Down Syndrome / Q000235:genetics*; D006801:Humans; D007621:Karyotyping; D008297:Male; D010641:Phenotype