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 ?
In 2011, members of a Society of Interventional Radiology Foundation's Research Consensus Panel noted that evaluating people with multiple sclerosis who have narrowed jugular and azygos veins--and examining the value of widening those veins with angioplasty--warranted careful, well-designed research.
Interruption of the IVC or persistent left IVC with azygos or hemiazygos continuation is an unusual but well-known anomaly of the IVC (3-8).
CT evaluation of congenital and acquired abnormalities of the azygos system.
The lymphadenpathy was more subtle than the sarcoid case above, but can be confidently called because of the adjacent azygos vein and aortic enhancement.
The initial 80 cc starting 60 s before the scan allows adequate contrast filling of the returning systemic veins, particularly the brachiocephalic and azygos veins.
June 16, 2011 /PRNewswire-USNewswire/ -- Evaluating patients with multiple sclerosis who have narrowed jugular and azygos veins-and the value of widening those veins with angioplasty-warrants careful, well-designed research, noted members of a Society of Interventional Radiology Foundation's Research Consensus Panel.
There was a midline liver, right-sided stomach, polysplenia in the right upper quadrant posterior to the stomach, and inferior vena cava (IVC) interruption with azygos continuation (Figures 1 and 2A).
2) Although there is great variability in the spectrum of abnormalities and no single anomaly that is pathognomonic for this disorder, IVC interruption with azygos continuation is the most common finding.
Abnormal localization of the cardiac apex, a common atrioventricular canal, anomalous systemic venous return (eg, bilateral superior vena cava, interruption of the inferior vena cava with azygos continuation), atrial and ventricular malformations and septal defects, absent coronary sinus, malpo sition or transposition of the great arteries, pulmonic stenosis, pulmonary atresia, patent ductus arteriosus, and anomalous pulmonary venous connection have often been described.
Early Study of 231 Patients Details Safety of Using Angioplasty to Widen Internal Jugular and Azygos Veins; Doctors Hope Results Encourage More Research to Explore Minimally Invasive Treatment Options for Those With Multiple Sclerosis
5) This can be followed as it passes vertically from the undersurface of the clavicles to the azygos arch.