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Rectal cancer
What causes rectal cancer?
The occurrence of rectal cancer is a process involving multiple factors and multiple steps, and it is the result of the interaction between environmental factors and genetic factors of the body. To date, its causes are not completely understood, but there are some factors that are considered high-risk. First, dietary factors are generally believed to be high in animal protein, high fat, and low fiber, which are significant factors in the high incidence of rectal cancer. Second, lifestyle factors such as prolonged sitting, smoking, drinking, being overweight, and obesity may increase the incidence of rectal cancer. Third, having a history of medical surgeries. Fourth, environmental factors, such as asbestos workers. Fifth, genetic factors.
Where to apply moxibustion for rectal cancer?
Firstly, the treatment of rectal cancer with moxibustion needs to be differentiated. Everyone has a different constitution. If someone has rectal cancer and has a heat-type constitution, it is not recommended to undergo moxibustion treatment. However, if the patient has a cold-type constitution, moxibustion treatment can be performed. The second issue is where exactly to apply the moxibustion. It can be done on the abdomen, around the navel, where there are acupuncture points, all suitable for moxibustion. For example, the navel, which corresponds to the Shenque point, can be treated with moxibustion. Other points above and below the navel, like Guanyuan and Qihai, can also be used for moxibustion.
Stage II colorectal cancer
Rectal cancer staging is based on the TNM system. "T" refers to the primary tumor, "N" indicates whether there are lymph node metastases, and "M" indicates the presence of distant metastases. Staging is determined according to these factors. Stage II generally refers to patients with T3, N0, M0, or T4, N0, M0. What does this mean? T3 indicates that the tumor has penetrated the base layer reaching the subserosal layer, or has invaded the tissues adjacent to parts of the colon or rectum that are not covered by peritoneum, which is described as T3. T4 means that the tumor has invaded through the entire bowel wall, perforated the visceral peritoneum, and involved other organs or structures, which is called T4. N0, M0 means there are no lymph node metastases and no distant metastases, such as to the liver or lungs. Such patients are clinically staged as stage II rectal cancer.
Can proctitis cause discomfort in the rectum?
As to whether proctitis will cause discomfort in the rectum, it depends on the specific situation. If it is only mild proctitis, generally, it does not cause discomfort for the patient. However, if the proctitis is severe and accompanied by conditions such as rectal ulcers, rectal discomfort is likely to occur, and the patient may experience symptoms such as pain and a sense of urgency followed by incomplete defecation. In severe cases, fever may also occur. Once a patient develops proctitis, it is advised to promptly complete an electronic colonoscopy examination. If necessary, tissue should be taken for a pathological biopsy to rule out the possibility of malignant tumors in the rectum.
What are the symptoms and early signs of rectal cancer?
In the early stages of rectal cancer, there are no obvious symptoms. Only when the condition progresses to a certain extent do some clinical symptoms appear. The first is a change in bowel habits or the nature of the stool. The second possible symptom is abdominal pain. The third possible outcome is intestinal obstruction. The fourth symptom occurs when the tumor develops to a certain extent, and lumps can be felt in the abdomen. The fifth point includes possible symptoms of systemic poisoning such as anemia, weight loss, fever, and weakness. The sixth point is that in the advanced stages of rectal cancer, some metastatic lesions may appear, such as extensive pelvic metastasis and infiltration, leading to pain in the sacral area and sciatic neuralgia; if areas like the vaginal, rectal mucosa, or bladder mucosa are involved, there may be vaginal bleeding or blood in the urine, resulting in conditions like rectovaginal or rectovesical fistulas.
Postoperative Diet and Care for Rectal Cancer
Firstly, rectal cancer is a malignant tumor of the digestive tract, so after surgery, it is recommended to eat foods that are easy to digest and absorb. Secondly, do not smoke, abstain from alcohol, and avoid spicy and irritating foods. Thirdly, it is advised not to eat indigestible foods, such as bean products and foods that cause gas, and to consume them in smaller quantities. Fourthly, rectal cancer may deplete a large amount of nutrients in the body, coupled with the damage from surgery, so it is essential to ensure a nutrition-rich diet, consume nutritious foods such as soups, easily digestible congee, and high-quality proteins to increase the body's nutrients. Fifthly, attention should be paid to timely adding clothing to avoid catching a cold.
The difference between rectal cancer and colon cancer lies in the location of the cancer. Rectal cancer occurs in the rectum, which is the final part of the large intestine, while colon cancer occurs in other parts of the colon.
Rectal cancer and colon cancer are collectively referred to as colorectal cancer, named according to the different locations where the tumors occur. Rectal cancer occurs in the rectum. Colon cancer includes tumors in the transverse colon, descending colon, ascending colon, and sigmoid colon, and tumors in these areas are called colon cancer. Both are known as colorectal cancer, and they exhibit similar clinical manifestations, including rectal bleeding, abdominal pain, and changes in bowel habits, such as constipation, diarrhea, alternating constipation and diarrhea, and changes in stool shape, such as narrowing of the stool. They are merely named differently based on the location of the tumors and are collectively referred to as colorectal cancer.
Does stage II rectal cancer require chemotherapy?
Whether a stage II colorectal cancer patient needs adjuvant chemotherapy after surgery depends on the specific circumstances. For example, stage IIA patients are classified as T3, N0, M0. The necessity of adjuvant chemotherapy for these patients should be determined based on the pathological report. If the report indicates the presence of vascular invasion, neural invasion, poor differentiation, or if microsatellite stability testing shows poor prognostic factors, then such patients should undergo postoperative adjuvant chemotherapy. If none of these conditions are present in a stage IIA patient, then postoperative adjuvant chemotherapy may not be necessary. Generally, stage IIB patients, whose tumors have penetrated the full thickness of the intestinal wall, are recommended to undergo postoperative adjuvant chemotherapy. Therefore, the specific conditions of the patient need to be considered.
Rectal cancer stage III
Rectal cancer staging is based on the TNM system. "T" refers to the primary tumor, and its stage depends on which layer of the bowel wall the tumor has invaded. "N" is based on whether there are lymph node metastases and the number of lymph nodes involved. "M" indicates whether there are metastases to distant organs. Staging is determined according to the TNM situation, where Stage I is the earliest and Stage IV is the latest. Stage III indicates lymph node metastasis without distant organ metastases, such as to the liver or lungs. In such cases, irrespective of whether T is T1 to T4, if there is lymph node involvement without distant organ metastasis, it is staged as Stage III.
Stage IV rectal cancer
In the staging of rectal cancer, we generally use the TNM staging system clinically. "T" refers to the primary tumor, "N" indicates whether there is lymph node metastasis, and staging is based on the status of the lymph nodes. "M" indicates whether there is distant metastasis. Stage IV refers to any stage of "T" and any stage of "N", as long as there is distant metastasis, such as rectal cancer metastasizing to the liver, lungs, or bones. When these distant organ metastases occur, the staging is M1, any "T", any "N", M1. This scenario is stage IV, indicating the presence of distant organ metastasis and represents advanced stage rectal cancer patients.