Indian J Occup Environ Med Close
 

Figure 6: (Case 4): a) Bronchoscopy showing extensive anthracotic pigments deposition throughout the bronchial tree of both sides (a) with complete occlusion of left upper division with mass like lesion and b) distortion of bronchial lumen. c) Biopsy showing alveolar septae thicken due to infiltration of numerous polygonal and spindle cell with large amount of black (anthracotic) pigment. There were chronic inflammatory cells, pigment-laden macrophages, and fibrosis. d) The fibrous tissue was heavily infiltrated with silicotic pigment deposition (polarizing birefregent positive)

Figure 6: (Case 4): a) Bronchoscopy showing extensive anthracotic pigments deposition throughout the bronchial tree of both sides (a) with complete occlusion of left upper division with mass like lesion and b) distortion of bronchial lumen. c) Biopsy showing alveolar septae thicken due to infiltration of numerous polygonal and spindle cell with large amount of black (anthracotic) pigment. There were chronic inflammatory cells, pigment-laden macrophages, and fibrosis. d) The fibrous tissue was heavily infiltrated with silicotic pigment deposition (polarizing birefregent positive)