Tuberculosis commonly involved the lymphnodes in the mesentery(73.7%), portacaval space(63.2%), hepatoduodenal ligament(57.9%), hepatogastric ligament (47.4%) and upper para-aortic region (47.4%).
At the level of azygos vein, 100% of the lymphnodes of azygos vein and the superior aortic recess were located among the superior vena cava, arch of azygos vein, trachea and concavity of aortic arch.