Fig. 2

Chest imaging performed during the observation. a At 6 months after the referral. New infiltrates appeared in the left middle field (white arrow). b At 14 months after the referral. The consolidation in the right upper field was deteriorated, and the infiltrates in the left middle field migrated toward the lower right (black arrows). c At 25 months after the referral. The infiltrations in the left lung field were improved without treatment. d At 28 months after the referral. New infiltrates appeared bilaterally (white arrowhead) e At 38 months after the referral. The patients developed apparent aspiration pneumonia, with chest radiograph showing bilateral consolidations. f At 5 years after treatment against M. fortuitum was started. Multiple pulmonary lesions improved