Isolated Aberrant Right Subclavian Artery Detected Prenatally In a Low-Risk Primigravida: A Case Report
Authors
Senior Resident, Department of Obstetrics and Gynecology, All India Institute of Medical Sciences, Bilaspur, Himachal Pradesh (India)
MBBS, Internship, Parul institute of medical science & research Vadodara, Gujarat (India)
Assistant professor, Department of Obstetrics and Gynecology, All India Institute of Medical Sciences, Bilaspur, Himachal Pradesh (India)
DNB, Department of Obstetrics and Gynecology, R.D.B.P Jaipuriya hospital, Jaipur, Rajasthan (India)
Article Information
DOI: 10.51584/IJRIAS.2026.110200066
Subject Category: Gynaecology
Volume/Issue: 11/2 | Page No: 794-796
Publication Timeline
Submitted: 2026-02-22
Accepted: 2026-03-02
Published: 2026-03-11
Abstract
Background: Aberrant right subclavian artery (ARSA) is the most common aortic arch variant increasingly recognised during routine fetal echocardiography. Although historically linked to chromosomal abnormalities, emerging evidence shows that isolated ARSA in screen-negative pregnancies has a favourable prognosis.
Case: We report a 24-year-old primigravida with a normal Level II ultrasound and a negative quadruple screening test. A routine fetal echocardiogram at 24 weeks demonstrated an isolated ARSA without any other cardiac or extracardiac anomalies. Pregnancy and delivery were
uneventful. Postnatal echocardiography confirmed isolated ARSA, and the neonate remained asymptomatic.
Conclusion: When identified as an isolated finding in the setting of normal aneuploidy screening, ARSA represents a benign vascular variant with excellent perinatal outcomes. Comprehensive counselling helps avoid unnecessary invasive testing and parental anxiety.
Keywords
Aberrant right subclavian artery, fetal echocardiography, prenatal diagnosis
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References
1. Yagel S, et al. Advanced three-vessel–trachea imaging and aortic arch variants. Ultrasound Obstet Gynecol. 2018;51:661–670. [Google Scholar] [Crossref]
2. Paladini D, et al. Aberrant right subclavian artery and chromosomal abnormalities. Prenat Diagn. 2012;32:968–973. [Google Scholar] [Crossref]
3. Borenstein M, et al. Aberrant right subclavian artery and aneuploidy risk. Ultrasound Obstet Gynecol. 2010;36:414–418. [Google Scholar] [Crossref]
4. Esmer AC, et al. Meta-analysis of isolated ARSA and chromosomal abnormality risk. Prenat Diagn. 2020;40:1504–1512. [Google Scholar] [Crossref]
5. Li Y, et al. Chromosomal microarray outcomes in isolated ARSA. Ultrasound Obstet Gynecol. 2021;58:883–890. [Google Scholar] [Crossref]
6. Zhang W, et al. ARSA and NIPT-negative pregnancies. BMC Pregnancy Childbirth. 2022;22:456. [Google Scholar] [Crossref]
7. Backer CL, et al. Long-term outcomes in vascular ring anomalies. J Pediatr Surg. 2019;54:2281–2287. [Google Scholar] [Crossref]
8. Contreras J, et al. Management of symptomatic arteria lusoria in children. Ann Thorac Surg. 2017;104:101–107. [Google Scholar] [Crossref]