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Histopathological findings in the lung of animals treated with coarse meta-chloro DPP pigment (30 mg/m³) after 5 days (A and B) and after a 3-week recovery period (C); H&E, 200×. (A) Terminal bronchiole of a control animal. (B) Epithelial hypertrophy of the terminal bronchiole and increased number of pigment-laden macrophages in a treated animal. (C) Regression of the epithelial hypertrophy of the terminal bronchiole and reduction of the number of pigment-laden macrophages.
