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. 2020 Feb 18;81(2):351–364. doi: 10.3348/jksr.2020.81.2.351

Fig. 10. A 70-year-old man with a squamous cell carcinoma arising from the wall of a bulla.

Fig. 10

A. A thin-walled subpleural bulla is retrospectively identified in the left upper lobe on the initial CXR (arrow) and CT (arrowhead).

B. At the 3-year follow-up, enlargement of the subpleural bulla is noted with irregular wall thickening, mural nodules, and septation on CXR (double arrows) and CT (arrowheads). A newly appeared nodule is also seen in the right upper lobe (arrow), which is regarded as a secondary tumor.

CXR = chest radiograph