Chronic bronchiolitis with associated eosinophilic lung disease (eosinophilic bronchiolitis). 
We encountered an adult patient with dyspnea, eosinophilia and bronchiolitis.  He was diagnosed as having diffuse panbronchiolitis, and was treated with erythromycin for 3 years, but his symptoms had gradually worsened.  Bronchoalveolar lavage showed marked eosinophilia, and video-assisted thoracoscopic lung biopsy revealed chronic bronchiolitis with associated eosinophilic lung disease (eosinophilic bronchiolitis).  To our knowledge, no case of eosinophilic bronchiolitis has been reported in the literature.