Abstract
Autopsies were performed on 19 cases of silicosis patients who died in Asahi Hospital of Workmen's Compensation for Accidents. Occupationally, these cases consisted of 11 potters, 1 mason, 2 silica sand workers, 1 glass worker, 1 sandblaster, and 3 miners. As to the cause of deaths, they consisted of 4 cases of cor pulmonale, 3 cases of spontaneous pneumothorax (including 1 potter), 3 cases of lung cancer (all of potters), 6 cases of other cancer (5 of these being potters), and 3 cases of other complications (2 of these being potters). In the lungs of non-ceramic silicosis, formation of seats of large nodules, emphysema, and typical silicotic nodules were confimed. This may be the reason why the cause of deaths was mainly car pulmonale or spontaneous pneumothorax. On the contrary, in the lungs of ceramic silicosis, nodules were mostly non-typical and formation of nodular seats was less marked. It is noteworthy that among 11 cases of potter's silicosis 3 cases of pulmonary cancer were found.
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