Azygous vein

Question 1

What does the azygos vein drain?

Answer 1

Thoracic wall and upper lumbar region

Question 2

What does the azygos vein connect?

Answer 2

Superior and inferior venae cavae

Question 3

What does ‘azygos’ mean?

Answer 3

Unpaired

Question 4

Where is the azygos vein located?

Answer 4

Upper part of posterior abdominal wall and posterior mediastinum

Question 5

What venous systems does the azygos vein connect?

Answer 5

Portal, caval, and vertebral venous systems

Question 6

What veins form the azygos vein?

Answer 6

Lumbar azygos, right subcostal, and right ascending lumbar veins

Question 7

What is the lumbar azygos vein considered as?

Answer 7

Abdominal part of the azygos vein

Question 8

Where does the lumbar azygos vein lie?

Answer 8

Right of the lumbar vertebrae

Question 9

What does the lower end of the lumbar azygos vein communicate with?

Answer 9

Inferior vena cava

Question 10

Which vein accompanies the right subcostal artery?

Answer 10

Right subcostal vein

Question 11

How is the ascending lumbar vein formed?

Answer 11

Vertical anastomoses connecting lumbar veins

Question 12

What alternative way can the azygos vein be formed?

Answer 12

Union of right subcostal and ascending lumbar veins

Question 13

Through which opening does the azygos vein enter the thorax?

Answer 13

Aortic opening of the diaphragm

Question 14

Where does the azygos vein arch forward?

Answer 14

Over the root of the right lung Where does the azygos vein terminate?

Question 15

Where does the azygos vein join?

Answer 15

Superior vena cava

Question 16

What is located anterior to the azygos vein?

Answer 16

Oesophagus

Question 17

Which structures are posterior to the azygos vein?

Answer 17

Lower eight thoracic vertebrae and right posterior intercostal arteries

Question 18

What is located to the right of the azygos vein?

Answer 18

Right lung, pleura, and greater splanchnic nerve

Question 19

What is located to the left of the azygos vein?

Answer 19

Thoracic duct, aorta (lower part), oesophagus, trachea, and vagus nerve (upper part)

Question 20

What forms the right superior intercostal vein?

Answer 20

Second, third, and fourth posterior intercostal veins

Question 21

Which posterior intercostal veins drain into the azygos vein?

Answer 21

Fifth to eleventh right posterior intercostal veins

Question 22

Where does the hemiazygos vein join the azygos vein?

Answer 22

Lower border of the eighth thoracic vertebra

Question 23

Where does the accessory hemiazygos vein join the azygos vein?

Answer 23

Upper border of the eighth thoracic vertebra

Question 24

Which bronchial vein is a tributary of the azygos vein?

Answer 24

Right bronchial vein

Question 25

Which small veins drain into the azygos vein?

Answer 25

Oesophageal, mediastinal, and pericardial veins

Question 26

What is another name for the hemiazygos vein?

Answer 26

Inferior hemiazygos vein

Question 27

How is the hemiazygos vein described in relation to the azygos vein?

Answer 27

Mirror image of lower part of azygos vein

Question 28

Which veins form the hemiazygos vein?

Answer 28

Left lumbar azygos, left ascending lumbar, and left subcostal veins

Question 29

Through which structure does the hemiazygos vein pierce the diaphragm?

Answer 29

Left crus of the diaphragm

Question 30

Where does the hemiazygos vein turn right?

Answer 30

Level of eighth thoracic vertebra Which structures does the hemiazygos vein pass behind?

Question 31

Which veins are tributaries of the hemiazygos vein?

Answer 31

Ninth to eleventh left posterior intercostal veins and oesophageal veins

Question 32

What is another name for the accessory hemiazygos vein?

Answer 32

Superior hemiazygos vein

Question 33

How is the accessory hemiazygos vein described in relation to the azygos vein?

Answer 33

Mirror image of upper part of azygos vein

Question 34

Where does the accessory hemiazygos vein begin?

Answer 34

Medial end of fourth or fifth intercostal space

Question 35

Where does the accessory hemiazygos vein turn right?

Answer 35

Level of eighth thoracic vertebra

Question 36

Which structures does the accessory hemiazygos vein pass behind?

Answer 36

Aorta and thoracic duct

Question 37

Which veins drain into the accessory hemiazygos vein?

Answer 37

Fifth to eighth left posterior intercostal veins and sometimes left bronchial veins