Correct!
1. The frontal chest radiograph shows a relatively circumscribed opacity at the left base

The frontal and lateral chest radiograph shows a relatively circumscribed mass projected over the left cardiac base. The heart is enlarged, but the mediastinal contours are otherwise unremarkable. Lung volumes appear normal and no evidence of cystic lung disease is seen, nor is there evidence of a fibrotic abnormality.

Which of the following is correct regarding the description of the chest radiographic findings of the left-sided lesion? (Click on the correct answer to proceed to the third of six panels)

1. The left lower thoracic lesion demonstrates an oblong configuration suggesting an origin from the left major fissure
2. The left lower thoracic lesion demonstrates the “hilum overlay” sign
3. The left lower thoracic lesion shows evidence of calcification
4. The left lower thoracic lesion shows evidence of cavitation
5. The left lower thoracic lesion shows the “incomplete border” sign

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