accessory hemiazygos vein


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Noun1.accessory hemiazygos vein - a vein formed by the union of the 4th to 7th posterior intercostal veinsaccessory hemiazygos vein - a vein formed by the union of the 4th to 7th posterior intercostal veins; empties into the azygos vein
vein, vena, venous blood vessel - a blood vessel that carries blood from the capillaries toward the heart; "all veins except the pulmonary vein carry unaerated blood"
References in periodicals archive ?
The tributaries are right superior intercostal veins, 4th to 11th right posterior intercostal veins, hemiazygos vein, accessory hemiazygos vein, right bronchial vein, several oesophageal, mediastinal and pericardial veins.
Sometimes, the accessory hemiazygos vein may drain either directly or after forming a common trunk with the left superior intercostals vein into the left brachiocephalic vein.