Perinatal outcomes following cell-free DNA screening in >32 000 women: Clinical follow-up data from a single tertiary center.

Abstract

OBJECTIVE:

Cell-free DNA (cfDNA) screening for aneuploidy was clinically introduced in 2011. We aim to focus on the follow-up information from a single tertiary center undergoing genome-wide cfDNA screening to evaluate this technology.

METHOD:

A total of 32 431 cases were retrospectively reviewed. The screening was performed using a BGI protocol, and the cfDNA results were analyzed together with the pregnancy outcomes, confirmatory testing results, and ultrasound findings.

RESULTS:

Of the 32 431 cfDNA screening cases, successful follow-up was conducted in 287 (82.2%) cases with high-risk cfDNA results, 85 (94.4%) cases with copy number variation (CNV) and rare autosomal trisomy (RAT) results, and 26 060 (81.5%) cases with low-risk cfDNA results. Among them, 234 with high-risk cfDNA results chose invasive testing, revealing 169 true positive cases. In cases with CNV and RAT results, 45 cases underwent invasive diagnosis, revealing six pathogenic CNVs and three uniparental disomies. In cases with low-risk cfDNA results, three false negative cases were confirmed.

CONCLUSION:

Cell-free DNA screening appears to be effective in detecting the common autosomal aneuploidies, but one-third of our cohort with high-risk results rejected confirmatory testing. Our data provide information on the clinical experience of large-scale whole-genome cfDNA screening that has global relevance for the implementation of this technology.

• Authors: Dong Liang, Ying Lin, Fengchang Qiao, Hang Li, Yan Wang, Jingjing Zhang, An Liu, Xiuqing Ji, Dingyuan Ma, Tao Jiang, Ping Hu, Zhengfeng Xu
• Journal: Prenatal diagnosis (Prenat Diagn) Vol. 38 Issue 10 Pg. 755-764 (09 2018) ISSN: 1097-0223 [Electronic] England
• PMID: 29966040 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2018 John Wiley & Sons, Ltd.

Chemical References

• Cell-Free Nucleic Acids

Topics

• Cell-Free Nucleic Acids (analysis)
• Chromosome Aberrations (statistics & numerical data)
• Female
• Follow-Up Studies
• Humans
• Maternal Serum Screening Tests (statistics & numerical data)
• Pregnancy
• Retrospective Studies
• Tertiary Care Centers (statistics & numerical data)
• Trisomy