Figure 2.

(a,b): Left hilar lymphadenopathy on the PA and lateral chest radiographs. (a) PA erect chest radiograph in this child with later confirmed pulmonary TB demonstrates a multilobulated lymph node mass projecting beyond the cardiac margin on the left (white arrows) consistent with left hilar lymphadenopathy. There is also loss of the left cardiac margin consistent with lingula air-space disease/atelectasis as a consequence of left main bronchus compression (black arrow). (b) Lateral chest radiograph confirms the presence of hilar lymphadenopathy by demonstrating an oval mass consistent with the ‘doughnut sign’ (curved white arrows), representing lymphadenopathy inferiorly and likely the normal vessels (aortic arch and left main pulmonary artery) superiorly.