Pneumoconioses is a group of diseases characterized by a diffuse fibrotic reaction in the lungs induced by inhalation of organic or inorganic particulate matter and chemical fumes and vapors. The pathogenesis of the fibrosis is through the release of fibrogenic chemical mediators. (Refer to Table 15-8 in your textbook).

Although the end-point is fibrosis, the pattern and location varies with the type.