Fig. 1. Post-hospital course in this case.

On first day after admission (day 1), this 43-year-old woman patient received a bronchoscopy. Bronchoalveolar lavage fluid (BALF) was collected from the upper left lobe. She was diagnosis with chronic eosinophilic pneumonia, and treated with prednisolone—initially at 50 mg/day, but reduced over time. On day 26, the shadow on her upper left lung had improved (per chest computed tomography [CT]), and she was discharged on day 28. Vertical axis: numbers of white blood cells and eosinophils; horizontal axis: days of hospitalization. Chest CT shows findings on her day of admission and 26 days after admission. PSL, prednisolone.