PMC5519474_01
Chest radiograph taken at initial presentation shows no abnormality (A). Computed tomography of the chest shows thickening of the bronchial wall without emphysema (B, C).
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Chest radiograph showed no abnormalities (Fig. 1A), and high resolution computed tomography (HRCT) of the chest showed thickening of the bronchial walls without emphysema (Fig. 1B and C).
A transbronchial lung biopsy specimen shows fibrous thickening and slight pigmentation (arrow) of the bronchiole (Hematoxylin and Eosin staining, x100).
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A transbronchial lung biopsy (TBLB) showed fibrosis and slight pigmentation of the bronchioles (Fig. 2) with small crystals viewed by polarized light microscopy, suggestive of silica exposure.