title: 49, XXXXY karyotype in mentally retarded boy.
mesh_terms: D001345:Autoradiography; D002675:Child, Preschool; D002906:Chromosomes, Human, 6-12 and X; D005149:Facial Expression; D005347:Fibroblasts / Q000166:cytology; D006801:Humans; D007006:Hypogonadism / Q000235:genetics; D008607:Intellectual Disability / Q000235:genetics*; D007621:Karyotyping; D007962:Leukocytes / Q000166:cytology; D008297:Male; D012728:Sex Chromatin; D012729:Sex Chromosome Aberrations / Q000235:genetics*