PMC7725561_01
CT scan demonstrating ill-defined fluid collection in the superior mediastinum (arrow).
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fig1
Stat electrocardiogram and bedside echocardiogram were unremarkable, and a CT scan demonstrated an ill-defined fluid collection present in the superior mediastinum (Figure 1).
Aberrant right subclavian artery coursing posterior to the trachea and esophagus (arrow).
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fig2
While a hematoma and a mass were both considered to be in the differential diagnosis, the CT scan also made note of an aberrant right subclavian artery (ARSA) coursing posterior to the trachea and esophagus (Figure 2).