Aberran right subclavian artery;i̇ncidance and corelation with other signs of down sendrome markers

Subklavyel artery arises from the aortic arch right brachiocephalic artery in the normal branching pattern. More rarely, a fourth variant of the left as a separate branch of the aortic arch, wandering behind the trachea and esophagus are directed toward the right shoulder.This situation is called subklaviel aberrant artery (ARSA). ARSA is mostly asymptomatic, yet; dysphagia or respiratory distress can ocur due to compressin of the esophagus and trachea in childhood. This is seen as 1% in the general population status, post-natal autopsy in individuals with Down syndrome can be observed by 30-40%. In our study, fetuses that detected DOwn syndrome detected after invasive procedures like amniocentesis or chorionic villus biopsy (CVS), were examined the presence of ARSA and other accompanying ultrasonographic anomalies by ultrasound. Our study included 24 Down syndore detected fetuses and 100 normal karyotype fetuses. ARSA was detected 8 of 24 fetuses with Down Syndrome. ARSA was not detected in the control group. ARSA is not an isolated anomaly and accompanied with other ultrasonographic anomalies. In the practice of obstetrics, three vessels and trachea view should be examined for the presence of fetal ARSA. In the presence of other accompanying anomalies, patients should be offered for karyotype analysing.