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Case Reports
. 1983 Apr;20(2):94-6.
doi: 10.1136/jmg.20.2.94.

Down's syndrome in twins of unlike sex

A Avni, J Amir, E Wilunsky, M B Katznelson, S H Reisner
Case Reports

Down's syndrome in twins of unlike sex

A Avni et al. J Med Genet. 1983 Apr.

Abstract

The occurrence of Down's syndrome in both dizygotic twins appears to be very rare. A case of twins of unlike sex is reported, in which chromosomal analysis showed trisomy 21 in both of them, while the parental karyotypes were normal. This is the third reported case of such a constellation, and the second one in which infant and parental chromosomal analysis was done.

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