CTappearance of the aberrant subclavian artery

ABSTRACT The aim of this study was to characterize aberrant right subclavian artery (ARSA) on chest Computed Tomography (CT) .The results are obtained from a review of 328 patients who were scanned for CT chest examination with different complications. ARSAwas seen in 5 (1.5%) of 328 study group. It was identified in one (0.6%) of 174 male and four (2.6%) of 154 female patients. All five patients have no symptoms of lusoria, respiratory distress or dysphagia. The ARSA was within normal diameter (mean 8.1±3.9) throughout its coarse and wider than 9 in its origin. Correlation of the ARSA and gender showed that females were affected more than males significantly. Familiarity with the normal CTappearance of the great blood vessels can be helpful in differentiating an aberrant subclavian artery in upper chest.