Prenatal case of RIT1 mutation associated Noonan syndrome by whole exome sequencing (WES) and review of the literature.

Abstract

OBJECTIVE:

We aimed to identify the genetic cause of one hydrops fetalis with Noonan syndrome (NS) manifestations including increased nuchal translucency (INT) and ascites through prenatal whole exome sequencing (WES).

CASE REPORT:

The case is a gestational age (GA) 18 fetus of two healthy parents with a normal child. We proceeded the genomic DNA from both fetus amniotic cells and parents to WES and identified a RIT1 mutation (c.268A>G) as the pathogenic cause of the hydrops fetalis by automatic prioritization algorithm after array-comparative genomic hybridization results showing negative.

CONCLUSION:

Mutations in RIT1 have been reported as the causes for different fetus structural abnormities in the recent years. This case contributes to the summary delineations of the prenatal NS phenotypes related to RIT1 mutation. In addition, the fast WES application, in this case, has demonstrated its advantage in prenatal disorder diagnosis when conventional karyotyping or chromosomal microarray testing result is negative.

• Authors: Zilong Qiu, Wan-Ting Chang, Yu-Ching Chou, Kuo-Chang Wen, Yang Ziying, Kayiu Yuen, Xiongying Cai, Tung-Yao Chang, Hung-Cheng Lai, Pi-Lin Sung
• Journal: Taiwanese journal of obstetrics & gynecology (Taiwan J Obstet Gynecol) Vol. 61 Issue 3 Pg. 535-538 (May 2022) ISSN: 1875-6263 [Electronic] China (Republic : 1949- )
• PMID: 35595454 (Publication Type: Case Reports, Review)
• Copyright: Copyright © 2022. Published by Elsevier B.V.

Chemical References

• RIT1 protein, human
• ras Proteins

Topics

• Comparative Genomic Hybridization
• Female
• Humans
• Hydrops Fetalis (diagnosis, genetics)
• Mutation
• Noonan Syndrome (diagnosis, genetics)
• Pregnancy
• Exome Sequencing
• ras Proteins (genetics)