Study of Various Patterns of Azygos Venous System and its Clinical Significance

Authors

  • Aarti Rohilla
  • Monika Rathee
  • Kamal Singh
  • Suresh Kanta Rathee

DOI:

https://doi.org/10.37506/ijfmt.v15i4.16650

Keywords:

Azygos venous system, Caterpillar, Hemiazygos vein, Ladder

Abstract

Background: The azygos system includes those veins which are straight in course, paravertebral in position
and not accompanied with the corresponding arteries. The azygos vein may arise as lumbar azygos vein
from the back of inferior vena cava or by the union of right subcostal and right ascending lumbar veins. It
enters the thorax, receives lower 8 right posterior intercostal veins, superior intercostal vein, hemiazygos
and accessory hemiazygos veins and ends by joining the superior vena cava. The hemiazygos vein is formed
on the left in a manner similar to that of azygos vein. The aim of the present study was to investigate the
various patterns of the azygos venous system.
Methods: A total number of 30 cadavers were studied and were evaluated based on the study of Anson BJ
and Mcvay CB.
Conclusion: Out of 30 specimens studied, 17 (56%) specimens showed normal pattern, 5 (16%) specimens
showed caterpillar pattern and rest 8 (26%) specimens showed ladder pattern.
Azygos system of veins serve as an alternative drainage channel between superior vena cava and inferior
vena cava in case of obstruction. The knowledge of various patterns could be useful for radiologists and
surgeons to prevent intra-operative hazards.

Author Biographies

Aarti Rohilla

Professor, Department of Anatomy, Pt. B. D. Sharma PGIMS, Rohtak

Monika Rathee

Demonstrator,  Department of Anatomy, Pt. B. D. Sharma PGIMS, Rohtak

Kamal Singh

Professor,  Department of Anatomy, Pt. B. D. Sharma PGIMS, Rohtak

Suresh Kanta Rathee

Sr. Prof. & Head, Department of Anatomy, Pt. B. D. Sharma PGIMS, Rohtak

Published

2021-08-16

How to Cite

Aarti Rohilla, Monika Rathee, Kamal Singh, & Suresh Kanta Rathee. (2021). Study of Various Patterns of Azygos Venous System and its Clinical Significance. Indian Journal of Forensic Medicine & Toxicology, 15(4), 9-13. https://doi.org/10.37506/ijfmt.v15i4.16650