title: Buccal smears and numerical sex chromosome anomalies.
abstract: The results of buccal smear examinations of patients in five institutes for mental retardates, a psychiatric hospital, a home for physically handicapped children, two schools for the deaf, a normal primary school and a newborn nursery are reported. Extra X chromosomes were found in 4/1 000 mentally retarded males, in 1,8/1 000 mentally ill patients and in 1,3/1 000 newborn females. Extra Y chromosomes were found in 1,5/1 000 males, and 3,6/1 000 males were noted to have non-fluorescing Y chromosomes, a normal variant.
mesh_terms: D000328:Adult; D002610:Cheek / Q000166:cytology; D002648:Child; D003581:Cytodiagnosis; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000235:genetics; D008297:Male; D009061:Mouth Mucosa / Q000166:cytology*; D012728:Sex Chromatin / Q000648:ultrastructure; D012729:Sex Chromosome Aberrations / Q000175:diagnosis* / Q000453:epidemiology; D013019:South Africa; D014960:X Chromosome / Q000648:ultrastructure; D014998:Y Chromosome / Q000648:ultrastructure