D. Radhika1, B. Vijaya Nirmala2, G. Kanchana Latha3
INTRODUCTION
Azygos system of veins taken out for study because its nearness to viscera-like intrathoracic course of esophagus, aorta, heart, lungs and its intimate relationship with contents of posterior mediastinum. Azygos system includes Azygos vein and accessory Azygos vein and Hemiazygos vein. The present study carried out on hundred cadavers, out of which foetus 10, children 8, adults 82, in three years span in RIMS Medical College, Kadapa. Their formation, course, relations, termination, their tributaries and communications are explored. Different variations are observed. Knowledge of such variations and drainage pattern is significant in abdominal surgeries also plays an important role in CT and MRI studies on posterior mediastinum. Variations in Azygos system also useful for thoracic surgeon because its vulnerability to damage during the surgical procedures, injuries, firearm wounds.
