The diagnostic criteria for early colorectal cancer are

The incidence of colorectal cancer has been rising in recent years, but many people still cannot recognize this disease. Experts point out that colorectal cancer is a common malignant tumor in the gastrointestinal tract, and its incidence rate is second only to stomach and esophageal cancer. The cause of colorectal cancer is still not very clear. Its incidence is related to social environment, eating habits, genetic factors, etc.

1. Diagnosis of colorectal cancer: patients in the middle stage have obvious changes in bowel habits, with the number of bowel movements reaching more than ten times a day. Most of the stools are loose or mucous, and mucous or thick bloody stools can also be seen. There is an obvious sense of urgency, and some patients may have fresh blood in their stools. There is dull pain or heaviness in the abdomen before and after each bowel movement. In the late stage, the above symptoms are significantly aggravated, accompanied by anemia, weight loss, and obvious heaviness in the anus. Some patients may have symptoms of low intestinal obstruction such as abdominal distension, abdominal pain, nausea, and vomiting. Some also have ascites, jaundice, frequent urination, and dysuria. Patients in the very late stage develop cachexia.

2. Early diagnosis: patients may not have any subjective symptoms, or only have blood in the stool, which is similar to the symptoms of ulcers and is often ignored. Some patients may have slightly increased bowel movements and loose stools. Early diagnosis of rectal cancer in patients can touch small nodules or small ulcers, which are not hard in texture and can move with the mucosa and have good mobility.

3. In the middle stage, digital examination can feel a cauliflower-like mass with raised edges and ulcers in the middle. It is brittle and easy to bleed, and has a certain degree of mobility. In the late stage, digital examination can feel a hard mass like a stone, which often surrounds the rectum. The local intestinal tract is stiff and narrow, the mass is brittle and easy to bleed, and it is fixed to the pelvis and cannot move.

Generally, patients with bloody stools should be highly alert in clinical practice, and should not be hastily diagnosed as "dysentery" or "internal hemorrhoids". Further examination is necessary to rule out the possibility of cancer. For the early diagnosis of rectal cancer, it is important to attach importance to the application of rectal digital examination, proctoscopy or sigmoidoscopy. Pathological diagnosis can be obtained through microscopic examination.