Related Experiment Videos
Multiple variations of the azygos venous system
1Department of Anatomy, Faculty of Medicine, University of Kocaeli, Turkey.
Surgical and Radiologic Anatomy : SRA
|June 17, 1999
Summary
This study details an unusual variation of the azygos venous system, noting the absence of the hemiazygos vein. Understanding these anatomical variations is crucial for accurate medical imaging and surgical procedures.
Area of Science:
- Anatomy
- Vascular Anatomy
- Thoracic Anatomy
Background:
- The azygos venous system is a critical component of the thoracic venous drainage.
- Variations in the azygos venous system are not uncommon but can pose diagnostic and surgical challenges.
Purpose of the Study:
- To report a specific case of azygos venous system variation observed during dissection.
- To highlight the importance of recognizing anatomical anomalies of the azygos venous system.
Main Methods:
- Anatomical dissection of the thoracic region.
- Detailed observation and documentation of venous structures, particularly the azygos and hemiazygos veins.
Main Results:
- Absence of the hemiazygos vein was noted.
- A common trunk formed by the posterior 8th, 9th, and 10th intercostal veins crossed anterior to the aorta and posterior to the esophagus.
- This trunk drained into the azygos vein between the T7-T8 vertebrae, with the 7th left posterior intercostal vein also joining this trunk.
Conclusions:
- Anatomical variations in the azygos venous system, including atypical courses and drainage patterns, are significant.
- Awareness of these variations is essential for surgeons operating in the mediastinum.
- Radiographic interpretation requires careful consideration of potential azygos system anomalies.