title: Recently recognized chromosomal defects of clinical importance.
abstract: We review those conditions which have recently been recognized to be associated with small, sometimes difficult to detect, chromosomal abnormalities. These include the Prader-Willi syndrome and X-linked mental retardation.
mesh_terms: D002869:Chromosome Aberrations / Q000175:diagnosis / Q000235:genetics*; D002872:Chromosome Deletion; D025063:Chromosome Disorders; D005260:Female; D005600:Fragile X Syndrome / Q000235:genetics; D008040:Genetic Linkage; D006801:Humans; D008297:Male; D014178:Translocation, Genetic; D014960:X Chromosome