Importance in prenatal diagnosis of the detection of isolated aberrant right subclavian artery

Objective: We aimed to evaluate the significance of isolated aberrant right subclavian artery (ARSA) diagnosis. Case: In this case study, we are presenting the prenatal diagnosis and fetal results of two cases (forty-year-old at 20 weeks of gestation and twenty-eight-year-old at 23 weeks of gestation) who were diagnosed with ARSA. Conclusion: As aberrant right subclavian artery (ARSA), which has the incidence rate of 1.4% in normal population, has increased up to 40% in cases with Down syndrome, it has been considered to add ARSA into the markers of Down syndrome which can be established with prenatal ultrasonography diagnosis as one of the vascular markers.