抄録
The investigation was made on 22, 661 autopsied cases collected from 37 university hos-pitals and other general hospitals in eastern part of Japan from 1946 to 1955.
The incidences by year, age, district, sex and by localisation of tumors were investigated by statistical method. The results obtained were as follows:
1) Number of malignant tumors increased twice as much in ten years. Gastric cancer was most common, followed by lung cancer but the percentage of gastric cancer among malignant growth relatively decreased, and the percentage of lung cancer increased by years. The percentages of uterus cancer and breast neoplasma increased markingly.
2) The percentage of lung cancer by age was more highly observed in older age group compared with gastric cancer, but the difference by sex was not clear. The uterus cancer was more common in 4th and 5th decade.
3) Gastric cancer had higher incidence in Tokyo and Kanto district compared with Tohoku and Shinetsu districts. The lung cancer was more common in Tokyo and Tohoku districts, but uterus cancer was more common in Tohoku, Hokkaido and Tokyo districts. The tumors of digestive organs decreased in both sex, but tumors of respiratory organs slightly increased in number.
4) Tumors of digestive organs had high in incidence in Kanto district, and low incidence in Tohoku district. Neoplasmas of respiratory organs had no specific tendency by district. Tumors of genito-urinary organs were infrequent in Tohoku district.
