Fig. 4
Chest CT images, bronchoscopy and histopathological examination. a–d Chest CT showed multiple infiltrates in the upper left lung and lower right lung and ground-glass opacities in the subpleural regions of both upper lung fields; e the mucosa of the left lower lobe bronchus was found to exhibit hyperaemia and swelling by bronchoscopy; f (haematoxylin–eosin staining, ×40) a pathological biopsy of the lower left lung base segment showed that a small number of eosinophils (arrow) had infiltrated the lung