title: Trisomy 13 in a 4-year-old child.
abstract: The karyotype 47,XY,13+ was observed in a mentally retarded four-year-old child, with numerous abnormalities and the typical dermatoglyphics of a trisomy 13. Banding analysis showed a complete extra chromosome 13.
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics*; D002675:Child, Preschool; D002901:Chromosomes, Human, 13-15; D003878:Dermatoglyphics; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007621:Karyotyping; D008297:Male; D013577:Syndrome; D014314:Trisomy