過去１３年間の肺癌における組織型の推移

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  • Change in ratio of histological types of lung cancer in the past 13 years.

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The changes in ratios of various histological types of lung cancers were investigated in lung cancer patients treated in the past 13 years. The subjects were 955 patients confirmed to have lung cancers by histopathological diagnosis in this hospital from 1976 to 1988. The patients consisted of 711 males and 244 females. Patients with adenocarcinomas and squamous cell carcinomas consisted of 45% and 33%, respectively, of the subjects. Patients with lung cancers increased annually during the investigated period. With respect to the ratio of each histological type of lung cancers to the total number of lung cancers, that of squamous cell carcinoma decreased and that of adenocarcinoma increased during the investigation period. These tendencies resulted in the reversal of the ratios of squamous cell carcinomas and adenocarcinomas in 1981 that has continued since then. The changes in the ratios of these histological types of lung cancer were not ascribed to differences in sex or age. According to the registration of patients in the Lung Cancer TNM Committee of Japan until 1983, it was suggested that the ratio of adenocarcinoma has increased all over Japan. Conventionally, the incidence of squamous cell carcinomas was said to be higher than that of adenocarcinomas. However, it was suggested recently that the incidence of adenocarcinomas has exceeded that of squamous cell carcinomas.

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  • 肺癌

    肺癌 31 (1), 1-6, 1991

    特定非営利活動法人 日本肺癌学会

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