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The left gonadal vein usually empties into (inferior aspect of) [2] the ipsilateral renal vein [2] [3]: 1144 proximally to where the renal vein crossing over the aorta. [ 2 ] The right gonadal vein typically empties directly into the (right anterolateral aspect of) inferior vena cava , joining it at an acute angle, some 2 cm inferior to the ...
However, the azygos vein is occasionally located in the midline or two independent veins may be present like in early embryonic development. In some rare variations, for example, it also drains thoracic veins, bronchial veins, and even gonadal veins. The vein is so named because it has no symmetrically equivalent vein on the left side of the body.
Bronchial veins drain venous blood from the large main bronchi into the azygous vein, and ultimately the right atrium. Venous blood from the bronchi inside the lungs drains into the pulmonary veins and empties into the left atrium; since this blood never went through a capillary bed it was never oxygenated and so provides a small amount of ...
Since the left gonadal vein drains via the left renal vein, it can also result in left testicular pain [7] in men or left lower quadrant pain in women, especially during intercourse and during menstruation. [8] Occasionally, the gonadal vein swelling may lead to ovarian vein syndrome in women.
On the right, the gonadal veins and suprarenal veins drain into the inferior vena cava directly. [1] On the left, they drain into the renal vein which in turn drains into the inferior vena cava. [1] By contrast, all the lumbar veins and hepatic veins usually drain directly into the inferior vena cava. [1]
There are four main pulmonary veins, two from each lung – an inferior and a superior main vein, emerging from each hilum. The main pulmonary veins receive blood from three or four feeding veins in each lung, and drain into the left atrium. The peripheral feeding veins do not follow the bronchial tree.
The first sign of a malignancy, especially an intra-abdominal one, may be an enlarged Virchow's node, a lymph node in the left supraclavicular area, in the vicinity where the thoracic duct empties into the left brachiocephalic vein, right between where the left subclavian vein and left internal jugular join (i.e., the left Pirogoff angle).
The hemiazygos vein and the accessory hemiazygos vein, when taken together, essentially serve as the left-sided equivalent of the azygos vein. [2] That is, the azygos vein serves to drain most of the posterior intercostal veins on the right side of the body, and the hemiazygos vein and the accessory hemiazygos vein drain most of the posterior intercostal veins on the left side of the body. [2]