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Silicosis Silicosis , Previously miner's phthisis , grinder's asthma , potter's rot and other occupation-related names is a form of occupational lung disease caused by inhalation of crystalline silica dust , and is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs. It is a type of pneumoconiosis. Phthisis - any disease causing a wasting away of p...