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33-year old male presenting with cough. (a) shows normal lung on first CT. (b) showed a new ground-glass opacity lesion in the right lower lobe (arrow) after 2 days. (c) follow-up image obtained 6 days later showed the lesion was larger and expanding in the posterior segment of right lower lobe and a new small lesions appeared in left lower lobe. (d) follow-up image obtained 14 days later showed the lesions were gradually absorbed.
