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Accessory hemiazygos vein

Vein in the human body

Summary

Vein in the human body

Field	Value
Name	Accessory hemiazygos vein
Latin	vena hemiazygos accessoria,
vena azygos minor superior
Image	Gray480.png
Caption	Diagram showing completion of development of the parietal veins (accessory hemiazygos vein visible at center-left)
Image2	Gray577.png
Caption2	The venae cavae and azygos veins, with their tributaries
DrainsTo	Hemiazygos vein, azygos vein

vena azygos minor superior The accessory hemiazygos vein, also called the superior hemiazygous vein, is a vein on the left side of the vertebral column that generally drains the fourth through eighth intercostal spaces on the left side of the body.

Structure

The accessory hemiazygos vein varies inversely in size with the left superior intercostal vein.

It usually receives the posterior intercostal veins from the 4th, 5th, 6th, 7th, and 8th intercostal spaces between the left superior intercostal vein and highest tributary of the hemiazygos vein; the left bronchial vein sometimes opens into it.

The vein usually crosses the body of the eighth thoracic vertebra to join the azygos vein. Alternatively, it ends in the hemiazygos vein.

When this vein is small, or altogether absent, the left superior intercostal vein may extend as low as the fifth or sixth intercostal space.

References

(July 2011). "Normal variants of the accessory hemiazygos vein". The British Journal of Radiology.
(September 2016). "Anatomical Variations of the Azygos Venous System: Classification and Clinical Relevance". International Journal of Morphology.
Rakovich, George. (2010-01-01). "8 - Thoracic Surgical Anatomy and Procedures". W.B. Saunders.

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

thoracic-veins veins-of-the-torso

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