Common rectal tumors include internal hemorrhoids, external hemorrhoids, hypertrophy of anal papillae, rectal polyps, rectal prolapse, and rectal cancer. Rectal cancer is formed by the malignant transformation of rectal tissue cells and is a common malignant tumor in the gastrointestinal tract, with an incidence rate second only to gastric and esophageal cancer. It is the most common part of colorectal cancer (accounting for about 65%). The vast majority of patients with genetic diseases are over 40 years old, with those under 30 years old accounting for about 15%, and men are more common with a ratio of 2-3:1. Rectal cancer is a lifestyle disease, and its incidence rate has been increasing year by year with the improvement of living standards. There are reports that the incidence rate of colorectal cancer (colorectal cancer + rectal cancer) ranks third (the first two are lung cancer and gastric cancer), and by 2015, the incidence rate of colorectal cancer may exceed that of lung cancer and gastric cancer, ranking first. Therefore, research on the diagnosis and treatment of rectal cancer is an important topic.
Rectal tumors are not necessarily cancer. Because anal papilloma, rectal polyps are also common rectal tumors. However, if there is a change in the daily bowel habit recently, with five or six times a day, almost every time after defecation with blood, one should be highly vigilant about colorectal cancer. The bleeding of colorectal cancer is mostly fresh and often accompanied by mucus, some mixed with feces, some with an odor, and the bleeding is mostly continuous, some intermittent. Because of the stimulation of the cancer, there are often symptoms such as anal distension, incomplete defecation, frequent defecation but no feces, and increased frequency of defecation. It is recommended to go to the hospital for a check-up as soon as possible (rectal examination, analoscopy, full colonoscopy, pathological examination of the lesion tissue), to strive for early diagnosis and early treatment.