Figure 2 Pathology of transbronchial biopsy and BAL cytology
(A) Transbronchial biopsy showing prominent pneumocyte hyperplasia with areas of organising fibrin and fibroblastic tissue. The alveolar septa showed some mild chronic inflammatory cell infiltrates (haematoxylin-eosin stain, original magnification × 200). (B) BAL cytology specimen showing a fibroblastic ball lined by pneumocytes (Papanicolaou stain, original magnification × 400). BAL=bronchoalveolar lavage.