The prospective study covered some principles of silicosis formation in workers of polymetallic mines. Mild and mainly diffuse sclerotic type of silicosis was revealed in 13% of the examinees with suspected silicosis, no additional X-ray data and no history, who were under exposure to the dust during 8-10 years. Variably calcified thoracic lymph nodes prove prominent risk of nodular silicosis (16.7%) and mostly progressive silicotuberculosis (50.0%). Increased vascular markings primarily in lower lungs and history of frequent respiratory infections and repeated pneumonia shows diffuse sclerotic silicosis complicated by chronic bronchitis. The data obtained necessitate further improvement of occupational safety and differentiated treatment and prophylaxis to prevent silicosis with its complications.
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