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One thousand three hundred and fourty-five cases of pneumoconiosis, 264 autopsy cases of pneumoconiosis, 37 cases of pneumoconiosis combined with lung cancer and 314 cases of primary lung cancer were examined statistically on sex, age, amount of smoking (Brinkman Index), types of pneumoconiosis on X-ray findings (pR 1, 2, 3, and 4) and histological findings of cancers.Summary of the study: (1) autopsy cases of pneumoconiosis were elderly, more amounts in pR4 in type and no causative relationship was found between the death and smoking amounts.(2) the type of pneumoconiosis combined with lung cancer were more pR3 in amounts.(3) male patients of primary lung cancer and pneumoconiosis combined with lung cancer were significantly heavy smokers and no difference of their histological findings was noted between two groups.(4) on the primary lung cancer cases: 60% and more of them were over sixth decade; male to female ratio were 3.8: 1.0; squamous cell carcinoma were found more in male and adenocarcinoma were more in female, and among heavy smokers we found more frequently anaplastic cell carcinoma and next squamous cell carcinoma, but adenocarcinoma has no relationship with smoking amounts.(5) from these studies and literatures on some industrial dusts we had expected the danger grades to lung cancer with ages, histological findings and the locations of tumors in lungs, i. e. the younger, the more dangerous, anaplastic and squamous cell carcinoma worse than adenocarcinoma, the central locations of tumors in lungs worse than peripheral ones.(6) smoking amounts were not related with the frequencies of chronic bronchitis in pneumoconiotic patients.
一般社団法人国立医療学会の論文

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一般社団法人国立医療学会 | 論文

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一般社団法人 国立医療学会 | 論文

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一般社団法人国立医療学会 | 論文