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The exposure of asbestos was surveyed in the 92 autopsy cases, including 60 cases of lung cancer with the digestion method of lung tissue. More or less asbestos body was found in 94.6% of cases examined. There was no correlation between numbers of asbestos bodies and histological types of lung cancer. In the group of pulmonary fibrosis, the pleural adhesion was more intense in the cases with increased number of asbestos bodies. More than 80 asbestos bodies per 1g of wet lung tissue were found in 4 cases, but there was no significant relation between occupation and the grade of asbestos contamination.