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Retroperitoneal teratoma as first sign of Klinefelter's syndrome.
  1. S Hachimi-Idrissi,
  2. S Desmyttere,
  3. A Goossens,
  4. B Desprechins,
  5. J Otten
  1. Department of Paediatrics, University Hospital, Free University of Brussels, Belgium.


    A 5 month old boy with a retroperitoneal teratoma was found to have a 47 XXY karyotype indicating Klinefelter's syndrome. This observation suggests that patients with the syndrome may be at risk of germinal tumours in sites other than those usually reported (mediastinum, brain, and testes).

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