Shukla D, Dinunzio M, Colaiacovo S, Meybodi AM, Saleh M. An uninformative NIPT as an early indicator of cri-du-chat due to a chromosomal 5;18 translocation-An atypical presentation of a rare cytogenetic phenomenon.
Clin Case Rep 2023;
11:e7732. [PMID:
37529133 PMCID:
PMC10387510 DOI:
10.1002/ccr3.7732]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 07/06/2023] [Accepted: 07/11/2023] [Indexed: 08/03/2023] Open
Abstract
We present a patient with cri-du-chat syndrome secondary to a rare cytogenetic mechanism. Our patient was the product of a dichorionic diamniotic twin pregnancy initially flagged with soft markers on ultrasound and uninformative single-nucleotide polymorphism (SNP)-based noninvasive prenatal testing (NIPT) for chromosome 18. Subsequent NIPT using proprietary-targeted amplification methodology returned low risk for chromosomal aneuploidies 13, 18, and 21. Due to postnatal clinical findings, a clinical microarray and chromosomal karyotype confirmed cri-du-chat syndrome due to a de novo psu dic(5;18) (p15.2, p11.32). In this report we focus on these cytogenetic changes and discuss some of the current guidelines for prenatal microarray indications.
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