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A liveborn case of 49,XXXY, + 18.
  1. N B Kardon,
  2. A L Berger,
  3. M Elice,
  4. J G Davis,
  5. E C Jenkins


    The first case of a liveborn male infant trisomic for both the X and the No 18 chromosome is presented. The patient had multiple congenital anomalies many of which were similar in appearance to patients with trisomy 18. The proband died after 2 days. Both maternal and paternal karyotypes were normal.

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