Ring chromosome 15:r(15).  Identification by R banding.
Upon investigating the mental retardment of a small girl who was not dysmorphic, a ring chromosome D was discovered.  Thermic moderate denaturation enabled us to confirm it as being an r(15).  The r(15) syndrome scarcely affects the phenotype.  On the other hand, height is consistently reduced.
D002675:Child, Preschool; D002869:Chromosome Aberrations; D002901:Chromosomes, Human, 13-15; D003582:Cytogenetics; D005260:Female; D006130:Growth Disorders / Q000235:genetics; D006801:Humans; D007621:Karyotyping; D013194:Staining and Labeling