title: Banding identification of chromosomal abnormalities in four patients: ring (6), translocation (2q-;15q+), translocation (21q;21q) and deletion (22q-).
abstract: Four children with mental deficiency and different chromosomal errors, previously reported, have been restudied with the use of the G-banding technique. The errors include ring-6, t(2q-; 15+), t(21q;21q) and 22q-.
mesh_terms: D000293:Adolescent; D002648:Child; D002869:Chromosome Aberrations; D002872:Chromosome Deletion; D025063:Chromosome Disorders; D002900:Chromosomes, Human, 1-3; D002901:Chromosomes, Human, 13-15; D002904:Chromosomes, Human, 21-22 and Y; D002906:Chromosomes, Human, 6-12 and X; D004200:Diseases in Twins; D004314:Down Syndrome / Q000235:genetics; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D007621:Karyotyping; D008297:Male; D014178:Translocation, Genetic