The associtation between aberrant right subclavian artery and trisomy 21 in a tertiary center in Turkey.

Our study shows that ARSA can be the only marker in trisomy 21. The examination of the subclavian artery must be a part of the fetal anomaly ultrasonography. Detecting an ARSA should increase the attentiveness of the sonographer to investigate for the other markers of trisomy 21. In the existence of other findings, invasive diagnostic procedures should be offered to the patients, whereas in cases that arsa is the only finding, other risk factors should be investigated to offer karyotyping or cell-free DNA analysis.