THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -It is typically located in the apicomedial portion of the right lung, separated from the rest of the right upper lobe by a visible fissure, termed an azygous fissure. The fissure can be identified as a fine, convex line on a chest radiograph in the para mediastinal portion of the right lung.

Detailed explanation-2: -The azygos fissure extends from the lateral aspect of the vertebral body posteriorly, to the right brachiocephalic vein and superior vena cava anteriorly. This consists of two layers of parietal pleura and two layers of visceral pleura 4.