We have not either. Since chromosome 19 is mostly euchromatic, its aneuploidy has detrimental embryolethal effect.

We detected one case of chromosome 19 trisomy mosaicism in products of conception of miscarriage (1:1200).

Still, mosaic cases in prenatal diagnosis have been described.

You can check in "Hsu LY et al. Rare trisomy mosaicism diagnosed in amniocytes, involving an autosome other than chromosomes 13, 18, 20, and 21: karyotype/phenotype correlations // Prenatal Diagnosis. - 1997. - Vol. 17(3). - 201-242.

We found in placenta studies,but only one time,you gave me very good answer