title: Absence of the fragile X in a group of patients with idiopathic mental retardation.
mesh_terms: D002648:Child; D002877:Chromosomes, Human / Q000648:ultrastructure; D003937:Diagnosis, Differential; D005600:Fragile X Syndrome / Q000175:diagnosis*; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis / Q000235:genetics*; D007621:Karyotyping; D008297:Male; D012729:Sex Chromosome Aberrations / Q000175:diagnosis*