azygos


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Related to azygos: azygos fissure, azygos lobe

azygos

 [az´ĭ-gos]
any unpaired part, as the azygos vein.
azygos vein a vein beginning in the abdomen as a continuation of the ascending lumbar vein; it and its tributaries serve as vessels for the return of blood from the thorax to the superior vena cava. The azygos vein also serves as a connecting link, through the ascending lumbar vein, between the venae cavae returning blood from above and below the heart. See anatomic Table of Veins in the Appendices.

az·y·gos

(az'ī-gos),
1. An unpaired (azygous) anatomic structure.
2. Synonym(s): azygos vein
[G. a- priv. + zygon, a yoke]

azygos

/az·y·gos/ (az´ĭ-gus)
1. unpaired.
2. any unpaired part, as the azygos vein.

azygos

(ā-zī′gəs) Anatomy
adj. also azygous (-gəs)
Not one of a pair, as a vein or muscle; occurring singly.
n.
An unpaired anatomical structure.

azygos

See azygous.

az·y·gos

(az'i-gŏs)
1. An unpaired (azygous) anatomic structure.
2. Synonym(s): azygos vein.
[G. a- priv. + zygon, a yoke]

azygos

1. any unpaired part, as the azygos vein.
2. unpaired. Called also azygous.

azygos vein
a vein beginning in the abdomen and coursing in the dorsal mediastinum which returns blood from the thorax to the heart. The right azygos is found in most domestic animals (rarely the pig) while the left azygos is found in pigs and ruminants.
References in periodicals archive ?
This study showed a high prevalence of atypical anatomical variants in Mexican population, of which variants known to increase the risk of ischemic events were the most found (absence of the anterior communicating artery, absence and hypoplasia of the precommunicating A1 segment, hypoplasia of the postcommunicating A2 segment of the anterior cerebral artery and the azygos artery) (Rhoton; Dimmick & Faulder).
In massive PE, RV/LV ratio and azygos vein diameter are the best predictors of survival, enabling correct prediction of survival in 89% of patients.
In the chest there are numerous lympho-venous connections between the azygos veins and the thoracic duct (3).
No cases of complete obstruction of the SVC and the azygos vein (type IV) were detected.
On the right side, the azygos vein and the anterior branch of the right pulmonary artery are at risk of injury.
As fever and neck swelling progressed and the patient detoriated, a posteroanterior (PA) chest X-ray (Figure 1 a) and a cervicothoracic computed tomography (CT) (Figure 1 b, 1 c) were performed which showed a necrotizing infection that extended from the neck to the level of the vena azygos along the right paratracheal region and a right sided pleural effusion.
Upper border--The lower rim of the azygos vein on the right; upper rim of the pulmonary artery on the left
The portion of the right supracardinal vein cephalad to the kidneys becomes the azygos vein; similarly, that portion on the left forms the hemiazygos system.
Surrounding tissues around superior vena cava were dissected up to azygos vein in order to examine presence of partial anormal pulmonary venosus connection and high PAPVC small-medium size was observed.
The vertebral venous plexus is a valveless system which communicates directly with pelvic, sacral, intercostal, azygos, caval and intracranial veins (1).
Relative position of the distal fistula to the azygos vein.