Fig. 2From: Two cases of hard metal lung disease showing gradual improvement in pulmonary function after avoiding dust exposureHistological findings from biopsy specimens in Case 1. Peribronchiolar fibrosis and lymphocytic infiltration are marked, but multinucleated giant cells are barely apparent (a: hematoxylin and eosin [HE] stain × 100; b: HE × 400)Back to article page