title: Unilateral radial aplasia and trisomy 22 mosaicism.
abstract: A child with unilateral radial aplasia, asymmetry, other malformations, and severe physical and mental retardation is reported. In blood and bone marrow cultures a low mosaicism for trisomy 22 was found. In a few cells a chromosome 22 was missing. The importance of early cytogenetic analysis on large numbers of cells is emphasised, especially in cases of asymmetry where mosaicism is suspected.
mesh_terms: D000015:Abnormalities, Multiple / Q000235:genetics; D001848:Bone Diseases, Developmental / Q000235:genetics*; D002871:Chromosome Banding; D002904:Chromosomes, Human, 21-22 and Y / Q000648:ultrastructure*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000235:genetics; D007621:Karyotyping; D010641:Phenotype; D011884:Radius / Q000002:abnormalities; D014314:Trisomy