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JOURNAL ARTICLE

False Low-Risk Single Nucleotide Polymorphism-Based Noninvasive Prenatal Screening in Pentasomy 49,XXXXY

Manesha Putra, Melissa A Hicks, Jacques S Abramowicz
American Journal of Perinatology Reports 2018, 8 (1): e4-e6
29362687
Introduction  Pentasomy 49,XXXXY is a sex chromosome anomaly difficult to be diagnosed prenatally. We describe a patient of pentasomy 49,XXXXY with false low-risk results using a noninvasive prenatal screening (NIPS). A 30-year-old G1P0 woman presented at 33 6/7 weeks, secondary to sonographic fetal anomalies. She had low-risk NIPS at 13 6/7 weeks. Anatomy survey showed bilateral clubfeet, clinodactyly of the left fifth digit, micropenis, and echogenic bowel. Cytogenetics analysis revealed pentasomy 49,XXXXY syndrome. We report third-trimester sonographic features of a fetus with pentasomy 49,XXXXY and the importance of thorough pre- and posttest counseling for NIPS.

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