E. Roberts et al., PROSPECTIVE PRENATAL-DIAGNOSIS OF PRADER-WILLI-SYNDROME DUE TO MATERNAL DISOMY FOR CHROMOSOME-15 FOLLOWING TRISOMIC ZYGOTE RESCUE, Prenatal diagnosis, 17(8), 1997, pp. 780-783
We present a prenatal predictive diagnosis of Prader-Willi syndrome ar
ising as a result of maternal heterodisomy for chromosome 15. The diag
nosis arose following chorionic villus sampling which showed a mosaic
trisomy 15 karyotype with a chromosomally normal follow-up amniocentes
is. Molecular studies on DNA extracted from cultured amniocytes showed
no evidence of a paternal allele at two widely separated loci and thi
s was taken as evidence of maternal disomy predictive of Prader-Willi
syndrome in the fetus. (C) 1997 by John Wiley & Sons, Ltd.