疾病特征是从盲肠到结肠、直肠的大肠黏膜上皮发生的癌变。进一步发展后,会扩散到腹膜、膀胱、子宫、肝脏、肺等器官,但扩散得较缓慢。60多岁的高龄者多发结肠癌,男性比女性多发,但女性结肠癌的病例在增加。症状根据癌的大小、发生的部位以及发展程度等情况各不相同。主要症状是便血、大便 The disease is characterized by a carcinogenesis of the mucosal epithelium of the colon from the cecum to the colon and rectum. After further development, it will spread to the peritoneum, bladder, uterus, liver, lungs and other organs, but it will spread more slowly. There are multiple colon cancers among elderly people in their 60s, and there are more men than women, but the number of women with colon cancer is increasing. Symptoms vary depending on the size of the cancer, the site of its occurrence, and the degree of development. The main symptoms are bloody stools and stools