Fig. 4
From: A case of airway aluminosis with likely secondary pleuroparenchymal fibroelastosis
Elemental analysis of the biopsy specimen by electron probe X-ray microanalysis (EPMA). Aluminum was identified in a fragment of bronchial wall obtained by trans-bronchial lung biopsy (TBLB), after staining with hematoxylin and eosin (a). Deposition of elements in the specimen was shown by red to yellow colours. The green colour indicated deposition of nitrogen as a control. Significant amounts of aluminum were identified by EPMA as shown by red to yellow colours (b), whereas iron and silica were detected in much lower amounts compared with aluminum (c, d)