PMC10313190_01
Chest CT showing multiple lung involvements at initial diagnosis.
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Chest computed tomography (CT) showed multiple pulmonary nodules, but no abnormal findings suggesting accumulative lung damage such as fibrosis ( Figure 1 ). The pathology showed that there was only fibrosis around the tumor as a tumor environment, and there was no obvious fibrosis in the background lungs consistent with the CT findings ( Supplementary Figure 1 ).
Chest CT showing the bilateral lung interstitial infiltrations.
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A CT scan showed no apparent tumor growth, but there were slight bilateral ground-glass shadows ( Figure 2 ). The clinical course after onset of DILD is summarized in the  Supplementary Figure 2 .
Chest CT showing exacerbation of bilateral lung interstitial infiltrate shadows on day 6 after admission.
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CT examination revealed expanded bilateral interstitial infiltrations ( Figure 3 ).
Chest CT showing the improvement in bilateral lung interstitial infiltrate shadows on day 21 of steroid treatment.
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Thereafter, the patient's respiratory condition improved rapidly, and the shadows in the bilateral lung fields disappeared on day 21 after starting steroid therapy ( Figure 4 ).