title: [A case of familial extra small chromosomes].
mesh_terms: D000328:Adult; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D002904:Chromosomes, Human, 21-22 and Y; D002906:Chromosomes, Human, 6-12 and X; D005260:Female; D006801:Humans; D008297:Male; D009456:Neurofibromatosis 1 / Q000235:genetics; D014178:Translocation, Genetic