Aortic nipple
Maximal diameter
<4.5 mm
Radiography (Posteroanterior)
The left superior intercostal vein (aortic nipple) should be less than 4.5 cm on plain film, otherwise further investigation is recommended.
Shields TW, LoCicero J, M.D. CE et-al. General Thoracic Surgery: Pt. 1. The lung, pleura, diaphragm, and chest wall. Sect. I. Anatomy of the chest wall and lungs. 1. Anatomy of the thorax. Lippincott Williams & Wilkins. (2009).
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