Fig. 1

Chest CT images and eosinophils in BAL. a–c CT scans showed multiple infiltrates in the lower left lung and ground-glass opacities in the subpleural regions of both upper lung fields; d eosinophils were observed in BAL (arrow); e–h double-lung disease was largely absorbed after 2 weeks; i, j pulmonary CT scan indicated improvement and resolution of the lesions 2 months later; k, l CT scan after 5 months