Aortic nipple
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An aortic nipple is seen in about 10% ofPA chest x-rays on the lateral surface of the aortic arch/aortic knob. It represents the left superior intercostal vein.
When prominent, superior vena cava obstruction should be considered as the left superior intercostal vein serves as a collateral pathway.
Very rarely, an absent azygos vein will be the cause of an aortic nipple 3.
-<p>An <strong>aortic nipple</strong> is seen in about 10% of<a href="/articles/chest-radiograph"> PA chest x-rays</a> on the lateral surface of the <a href="/articles/aortic-arch">aortic arch/aortic knob</a>. It represents the <a href="/articles/left-superior-intercostal-vein">left superior intercostal vein</a>.</p><p>When prominent, <a href="/articles/superior-vena-cava-obstruction">superior vena cava obstruction</a> should be considered as the left superior intercostal vein serves as a collateral pathway.</p>- +<p>An <strong>aortic nipple</strong> is seen in about 10% of <a href="/articles/chest-radiograph">PA chest x-rays</a> on the lateral surface of the <a href="/articles/aortic-arch">aortic arch/aortic knob</a>. It represents the <a href="/articles/left-superior-intercostal-vein">left superior intercostal vein</a>.</p><p>When prominent, <a href="/articles/superior-vena-cava-obstruction">superior vena cava obstruction</a> should be considered as the left superior intercostal vein serves as a collateral pathway.</p><p>Very rarely, an <a title="Absent azygos vein" href="/articles/absent-azygos-vein">absent azygos vein</a> will be the cause of an aortic nipple <sup>3</sup>.</p>
References changed:
- 3. Hatfield MK, Vyborny CJ, MacMahon H, Chessare JW. Congenital absence of the azygos vein: a cause for "aortic nipple" enlargement. (1987) AJR. American journal of roentgenology. 149 (2): 273-4. <a href="https://doi.org/10.2214/ajr.149.2.273">doi:10.2214/ajr.149.2.273</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/3496750">Pubmed</a> <span class="ref_v4"></span>