title: [Supernumerary metacentric small chromosome in a boy with mental retardation].
mesh_terms: D000015:Abnormalities, Multiple; D002648:Child; D002869:Chromosome Aberrations; D025063:Chromosome Disorders; D004431:Ear, External / Q000002:abnormalities; D005124:Eye Abnormalities; D006801:Humans; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D009667:Nose Deformities, Acquired
vernacular_title: Cromosoma pequeño metacéntrico supernumerario en un niño afecto de retraso mental.