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Am J Med Genet. 1997 Dec 19;73(3):327-9.

Trisomy 16pter to 16q12.1 and monosomy 22pter to 22q11.2 resulting from adjacent-2 segregation of a maternal complex chromosome rearrangement.

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  • 1Cytogenetics Laboratory, Alberta Children's Hospital, Calgary, Canada.


We report on a 16-week-old male fetus with partial trisomy 16 and partial monosomy 22 resulting from 3:3 adjacent-2 segregation of a maternal balanced complex chromosome translocation involving chromosomes 5, 16, and 22. The karyotype of the 29-year-old phenotypically normal mother was 46,XX,t(5;16;22)(q31.3;q12.1;q11.2). The karyotype of the fetus was 46,XY,der (5)t(5;16;22)(q31.3;q12.1;q11.2),+der(16) t(5;16;22)mat,-22. The fetus had multiple congenital anomalies, including bilateral cleft lip and palate.

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