Retroesophageal Right Subclavian Artery
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This is a post-mortem specimen showing a patent ductus arteriosus (D) and a retroesophageal right subclavian artery (R) coursing dorsally over the esophagus (E). Retroesophageal right or left subclavian arteries can be divided close to the aorta because of collateral circulation to the distal subclavian branches via the vertebral arteries. |
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