- 48,XXYY Klinefelter syndrome
- 48,XXYY variant of Klinefelter's syndrome
- XXYY syndrome
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We just found out that our grandson has 48,XXYY syndrome. We have an appointment with genetic doctors in a couple of weeks. I was wondering if you could give us some information on what to expect and the prognosis for this and what we have to look forward to with him.
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