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  • Title: Ring chromosome 22 in a mentally retarded child and mosaic 45,XX,-15,-22,+t(15;22)(p11;q11)/46,XX,r(22)/46,XX karyotype in the mother.
    Author: Fryns JP, Van den Berghe H.
    Journal: Hum Genet; 1979 Mar 12; 47(2):213-6. PubMed ID: 437787.
    Abstract:
    A ring chromosome 22 is described in a 6-year-old mentally retarded boy, who presented a dysmorphic syndrome. The ring chromosome 22 was inherited from the mother, in whom a 46,XX/46,XX,r(22)/45,XY,-15,-22,+t(15;22)(p11;q11) mosaic karyotype was found, indicating a high degree of instability of the chromosome(s) 22 in this woman.
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