Table 2.

Summary of the BAL and pathological characteristics of each patient

Patient	BAL	Bronchiolar wall	Peribronchiolar tissue	Alveolar spaces	Vasculitis
1	Neutrophilic (72%) and eosinophilic (6%) alveolitis	Goblet metaplasia and eosinophilic infiltration of mucosa and submucosa; thickening of the basal lamina	Nodular lymphoid inflammation and scattered non-necrotizing granulomas	No inflammation	No
2	Lymphocytic (85%) alveolitis	Goblet metaplasia and eosinophilic infiltration of mucosa and submucosa; thickening of the basal lamina	Nodular lymphoid inflammation with scattered eosinophils	Mild lymphoid interstitial inflammation with scattered eosinophils; mild macrophage accumulation in the alveolar spaces	No
3	Eosinophilic (52%) alveolitis	Goblet metaplasia and eosinophilic and lymphocytic infiltration of mucosa and submucosa. A thickening of the basal lamina. In the bronchiolar lumen: accumulation of epithelial cells, eosinophils and mucous.	Lymphocytic and eosinophilic inflammation mainly around small vessels	Mild interstitial inflammation consisting of lymphocytes and scattered eosinophils	No