Fetal mosaicism as a cause of false-negative noninvasive prenatal DNA screening for chromosome 21 aneuploidies


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Abstract

Objective. To explain the reason of false negative trisomy 21 NIPS result. Material and methods. The paper presents a clinical case of a 35-year-old patient with a false-negative NIPS result. We performed NIPS, FISH analysis and molecular karyotyping of peripheral blood of newborn baby. Results. FISH analysis of child’s blood has shown a mosaic form of trisomy 21. Conclusion. This case illustrates that negative NIPS cannot completely rule out the presence of aneuploidy, demonstrates the importance of first-trimester screening and the limitations of NIPS in pregnancies at high risk of aneuploidies according to the data of combined screening.

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About the authors

Jekaterina Shubina

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: jekaterina.shubina@gmail.com
Junior researcher, of molecular genetics laboratory

Ilya Y. Barkov

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: i_barkov@oparina4.ru
MD, clinical geneticist at molecular genetics laboratory

Olga K. Stupko

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: o_stupko@oparina4.ru
clinical geneticist at laboratory of Reproductive Genetics

Maria V. Kuznetsova

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: m_kuznetsova@oparina4.ru
PhD, Researcher at molecular genetic methods laboratory

Regina V. Krasheninnikova

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: r_krasheninnikova@oparina4.ru
clinical laboratory diagnostics doctor at molecular genetic methods laboratory

Lyudmila V. Kim

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: kimika@list.ru
Graduate student, Department of Pregnancy Loss Prevention and Therapy

Nana K. Tetruashvili

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: tetrauly@mail.ru
Doctor of Medicine, Head of the Department of Pregnancy Loss Prevention and Therapy

Andrey Y. Goltsov

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: g_goltsov@oparina4.ru
Researcher at molecular genetic methods laboratory

T. O Kochetkova

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: t_kochetkova@oparina4.ru
biologist of molecular genetics laboratory

Irina S. Mukosey

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: i_mukosey@oparina4.ru
Junior researcher, of molecular genetics laboratory

Natalia A. Karetnikova

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: n_karetnikova@oparina4.ru
PhD, Senior Researcher, Laboratory of Reproductive Genetics

Vladimir A. Bakharev

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: vbaharev@oparina4.ru
PhD, MD, professor, Chief Researcher, Laboratory of Reproductive Genetics

Dmitry Yu. Trofimov

Academician V.I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia

Email: d_troflmov@oparina4.ru
Ph.D., Head of Clinical and molecular genetics department

References

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  4. Smith M., Lewis K.M., Holmes A., Visootsak J. A case of false negative NIPT for Down syndrome-lessons learned. Case Rep. Genet. 2014; 2014: 823504.
  5. Hochstenbach R., Page-Christiaens G.C., van Oppen A.C., Lichtenbeit K.D., van Harssel J.J., Brouwer T. et al. Unexplained false negative results in noninvasive prenatal testing: two cases involving trisomies 13 and 18. Case Rep. Genet. 2015; 2015:926545.
  6. Wang Y., Zhu J., Chen Y., Lu S., Chen B., Zhao X. et al. Two cases of placental T21 mosaicism: challenging the detection limits of non-invasive prenatal testing. Prenat. Diagn. 2015; 33(12): 1207-10.

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