Monozygotic twins with discordant karyotypes: a case report.

O'Donnell, Colm P F; Pertile, Mark D; Sheffield, Leslie J; Sampson, Amanda · J Pediatr · 2004

case_report · Level V

Where this comes from

Abstract

A monochorionic twin pregnancy had normal male karyotype on chorionic villous sampling. At delivery, one twin presented as morphologically normal, the other as trisomy 21. A twinning event and chromosome division error shortly after conception resulted in monozygotic twins with discordant tissue karyotypes and blood chromosome chimerism for trisomy 21.

Medical subject headings