Correct!
3. Partial collapse of the left upper lobe is present
Figures 1A and B: Frontal and lateral chest radiography shows hazy opacity projected over the left upper thorax on the frontal examination (A), residing anteriorly within the lung on the lateral projection (arrowheads, B). Slight left lung volume loss is present, with a juxtaphrenic peak (arrow, A) present at the mid-portion of the left diaphragm (the “juxtaphrenic peak” sign represents a triangular-shaped opacity projecting superiorly at the medial half of the diaphragm, usually due to the presence of an inferior accessory fissure). The left hilum and prevascular region appears prominent and somewhat dense. The findings suggest partial collapse of the left upper lobe. Figure 1C: Frontal chest radiography obtained over 1 year before Figures A1 and B appears normal. In particular, note that the left hilar and prevascular area shows normal density; compare with Figure 1A.
Follow up frontal and lateral chest radiography (Figures 1D and E) was performed 6 months after the first set of images (Figures 1A and B) when the patient developed hemoptysis.
The lucency seen along the periphery of the aortic arch is known as:
1. The “incomplete border” sign
2. The “air-crescent” sign
3. The “reversed ground-glass halo” sign
4. The “Luftsichel” sign
5. The “dense hilum” sign