Figure 3.

(a,b): Lymphadenopathy, air-space disease and airway compression on chest radiograph and CT. (a) Frontal AP chest radiograph in a 14-month-old boy with confirmed pulmonary TB demonstrating right hilar and paratracheal lymphadenopathy as lobulated masses projecting from the right of the cardio-mediastinal shadow (white arrows). There is also air-space disease in the right upper lobe, tracheal compression (black arrow) and left main bronchus compression (curved black arrow), resulting from presumed subcarinal and left hilar lymphadenopathy. (b) Axial post-contrast CT scan confirming the right paratracheal lymphadenopathy which has a low-density centre and fine rim enhancement (white arrow) and AP compression of the trachea (black arrow), which was not appreciated on the AP radiograph.