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欧美等国30岁以下的青年人患大肠癌十分少见。我们收集欧美报告的65017例大肠癌中,仅701例年龄在30岁以下,占1.08％。但收集国内报告的13420例中,则有1621例年龄在30岁以下,占12.1％。因此年青人大肠癌多见成为我国大肠癌流行病学的重要特征之一。以往认为青年人大肠癌多见可能与血吸虫病合并大肠癌有关。然国内非大肠癌流行区东北、西北、华北等地报告的大肠癌病例
In Europe and the United States, young people under the age of 30 are very rare with colorectal cancer. Of the 65,017 colorectal cancer cases reported by Europe and the United States, only 701 were under the age of 30, accounting for 1.08%. However, of the 13420 cases that collected domestic reports, 1,621 were under 30 years old, accounting for 12.1%. Therefore, young people with colorectal cancer have become more common in the epidemiology of colorectal cancer in China. In the past, it was thought that young people with colorectal cancer may be more likely to be associated with schistosomiasis and colorectal cancer. However, cases of colorectal cancer reported in the northeastern, northwestern, and northern regions of the country where non-colorectal cancer is endemic