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Tetraploidy in a liveborn infant.
  1. I López Pajares,
  2. A Delicado,
  3. A Diaz de Bustamante,
  4. A Pellicer,
  5. I Pinel,
  6. M Pardo,
  7. M Martin
  1. Laboratory of Medical Genetics, Hospital La Paz, Madrid, Spain.


    We report a 3 month old boy with tetraploidy, found in peripheral blood and skin fibroblast cultures, with severely delayed growth and neurodevelopment, and with a cleft lip; these findings have not been described before. This report brings to seven the total number of liveborn infants with a 92,XXYY karyotype.

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