The Independent Right and Left Azygos Veins with Hemiazygos Absence: A Rare Case Presentation

Keskin, Suat; Keskin, Zeynep; Sekmenli, Nevin

doi:10.1155/2013/282416

Cited by 6 publications

(5 citation statements)

References 6 publications

(7 reference statements)

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“…Rao and Banerjee [ 37 ] noted this finding in 10% cases which is higher than present study. Similar finding was observed by Keskin et al [ 38 ] in computed tomography (CT) angiography of a 52-year-old female patient.…”

Section: Discussionsupporting

confidence: 90%

Variations of azygos vein: a cadaveric study with clinical relevance

Priya,

Philip,

Jain

et al. 2023

Anat Cell Biol

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The azygos vein can be formed as a single root, two roots, and three roots, namely lateral, intermediate and the medial roots respectively. The hemiazygos vein and the accessory hemiazygos vein are the tributaries of azygos vein rather than its left side equivalents. Its variations, especially in young persons without any relevant risk factors, may result in thromboembolic illness. This study aimed to describe the morphological and morphometric variations of azygos system of veins. The present study was conducted on thirty formalin fixed adult human cadavers by dissecting azygos vein from formation to termination and variations were noted. The azygos vein was formed by a single root in 56.7%, by two roots: the lateral root and intermediate root in 36.7% cases and by the lateral root and medial root in 6.6%. The vertebral level of termination of azygos vein was seen at the level of T4 vertebrae in 70% cases, at the level of T3 vertebrae in 20% of cases and at the level of T5 vertebrae in 10% cases. The course of azygos vein was varying in 13.3%. These morphological variations can be useful while performing mediastinal surgery, mediastinoscopy, surgery of the deformations of the vertebral column, neurovascular surgeries of the retroperitoneal organs, disc herniation and fracture of thoracic vertebrae.

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Section: Discussionsupporting

confidence: 90%

Variations of azygos vein: a cadaveric study with clinical relevance

Priya,

Philip,

Jain

et al. 2023

Anat Cell Biol

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“…[9] Our literature survey also revealed a case where the hemiazygos vein was absent with the presence of right and left azygos veins. [10] Another very rare variation associated with the azygos system of veins is opening of all pulmonary veins into the azygos vein. One such case has been diagnosed by echocardiographic technique.…”

Section: Discussionmentioning

confidence: 99%

A unique variation of azygos system of veins

Badagabettu

Shetty

D’Souza

2016

J Cardiovasc Echography

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Knowledge of variations of azygos and hemiazygos veins is of importance to cardiothoracic surgeons and radiologists during various surgical, radiological, and echography techniques. We report some unique variations of azygos system of veins observed during dissection classes for undergraduate medical students. The azygos vein was formed as usual by the union of right subcostal and ascending lumbar veins. The vein ascended upward and to the left to reach the midline at the level of the 9th thoracic vertebra. After ascending till 5th thoracic vertebra, it gradually inclined to the right of midline and terminated by opening into the superior vena cava at the level of the 3rd thoracic vertebra. There was no major variation in the tributaries of the azygos vein on the right side, except that the right superior intercostal vein crossed behind the azygos vein from right to left and opened into the left side of the azygos vein. Further, two anastomotic veins connected the 10th, 11th and 12th posterior intercostal veins with each other to form two anastomotic circles on the right side of 10th to 12th thoracic vertebrae. The hemiazygos vein bifurcated on the left side of the 10th thoracic vertebra and the two ends opened into the azygos vein at the level of 9th and 10th thoracic vertebrae forming a venous circle in front of the 10th thoracic vertebra. The course of accessory hemiazygos vein was noteworthy. Instead of its classic descending course, the vein ascended upward from the left side of the 8th thoracic vertebra till the 6th thoracic vertebra before opening into the azygos vein.

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“…The right brachiocephalic vein crossed the front of the aortic arch. Keskin et al [14] reported that, on the CT scan of a 52-year-old woman, the right azygos vein was present and poured into the superior vena cava. Moreover, a left azygos vein existed.…”

Section: Discussionmentioning

confidence: 99%

An abnormal course of the interazygos vein: a case report

Shiri

Madadi

2020

J Med Case Reports

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Background The azygos venous system in the posterior mediastinum has a complex developmental pattern. Case presentation During the dissection of this region, we encountered a variation in this system. In this case, we observed that the accessory hemiazygos and hemiazygos veins in the left side passed anterior to the aorta and drained to the azygos vein located on the left side of the vertebral column. Other structures were normal in this area. Conclusions This variation is important in mediastinal surgery and radiographic interpretation.

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The Independent Right and Left Azygos Veins with Hemiazygos Absence: A Rare Case Presentation

Cited by 6 publications

References 6 publications

Variations of azygos vein: a cadaveric study with clinical relevance

Variations of azygos vein: a cadaveric study with clinical relevance

A unique variation of azygos system of veins

An abnormal course of the interazygos vein: a case report

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