PMC8174119_01
Chest CT before treatment, showing a thick-walled cavity in the left upper lung, with smooth inner and irregular outer margins. The adjacent pleural and the left lower pleural were thickened.
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Vascular convergence sign and local pleural thickening can be seen (shown in Figure 1).
Chest CT after 6 weeks of treatment, showing the cavity disappeared, leaving only a little patchy infiltration. The pleural thickening was improved.
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The pleural thickening was reversed (shown in Figure 2).