Statistics on Gynecologic Cancer in Japan

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Abstract
In Japan, high-quality cancer statistics data have been collected through cancer registries, but these data are rarely summarized and reported in research articles. Here, we compiled statistical data on malignant tumors originating from gynecologic organs (ovary, corpus uteri, cervix uteri) in Japan. The number of patients in 2019 was 13,380, 17880, and 10879, respectively, and the number of deaths in 2021 was 5081, 2741, and 2894, respectively. Compared with 40 years ago, the incidence of ovarian cancer has tripled, the incidence of uterine corpus cancer (mainly endometrial cancer) has increased 15-fold, the mortality rate of uterine corpus cancer has tripled, and the incidence of cervical intraepithelial cancer has increased 10-fold in data standardized by the world population. Compared with the United States, the incidence rate of ovarian cancer has overtaken and the mortality rate of uterine corpus cancer is the same, while both the incidence and mortality rates of cervical cancer are higher in Japan. Immediate action is needed in Japan to prevent gynecologic cancers.

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