Is stage II-III colon cancer considered late stage?

Written by Cui Fang Bo
Oncology
Updated on November 18, 2024
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Patients with stage II and III colon cancer are not yet considered to be in the classic advanced stages. Current oncology believes that colon cancer is categorized as stage IV and considered advanced when distant metastases occur. Common sites of metastasis for colon cancer include the liver, lungs, and bones. Stage II colon cancer patients do not have metastases to the pericolic lymph nodes, which is relatively early; stage III colon cancer patients have metastases to the pericolic lymph nodes, which is later than stage II, but as long as there are no distant metastases, it does not reach the advanced stage IV.

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Colon cancer surgical methods

The surgical approach for colon cancer should be tailored based on the specific circumstances of the patient, involving a rational, comprehensive treatment strategy. The surgical principle is that early-stage cancers should undergo curative resection, while more advanced cancers should be treated with radical surgery or extended radical surgery. Once the treatment plan is determined, the choice of surgical methods should be made comprehensively based on the patient's specific conditions. For example, in the surgery of rectal cancer in the middle and lower segments, it should be considered whether to preserve the anus or perform abdominoperineal resection based on the tumor's biological characteristics, patient's age, overall health, and any concurrent diseases. It is not that there is one fixed type of surgery; the approach should be specifically tailored based on the detailed analysis of the issues at hand.

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Is colon cancer surgery a major surgery?

Colon cancer surgery is considered a relatively major procedure, ranking as a class three or four surgery in general surgery. Generally, it involves the resection of the entire transverse colon or tumors located in other areas such as the ascending or descending colon, accompanied by the removal of surrounding lymph nodes, followed by intestinal anastomosis and digestive tract reconstruction. Post-surgery, comprehensive anti-tumor treatment is usually required. After colon cancer surgery, the main focus is on preventing intestinal leakage, which is a serious complication. Dietary intake needs to be gradually restored after surgery. Initially, the patient may only be able to consume liquid and easily digestible foods, gradually transitioning to semi-liquid and regular diets, while also paying attention to eating smaller, more frequent meals.

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What are the symptoms of transverse colon cancer?

Transverse colon cancer is a type of colon cancer, belonging to malignant tumors of the digestive system. The main symptoms may include rectal bleeding, narrower stools, increased frequency of defecation, diarrhea, and it may also cause constipation. For instance, if the tumor in the transverse colon is large enough to block the intestinal lumen, it could lead to difficulty in defecating. Constipation or even signs of intestinal obstruction could occur. Generally, a diagnosis can be confirmed through an endoscopic biopsy. After diagnosis, transverse colon cancer can be treated surgically, primarily through curative surgery, followed by adjuvant chemotherapy and other comprehensive treatments.

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Late stage survival of transverse colon cancer

Late-stage colon cancer can still potentially allow for a relatively long survival time, such as living more than one year, two years, or even three to five years. Of course, this also depends on the treatment provided. Generally, it may not be possible to perform curative surgery directly in the advanced stages, but preoperative neoadjuvant chemotherapy, targeted therapy, and so on, can be administered first. If these treatments can reduce the size of the tumor and lower its stage, there could still be a chance for surgical treatment later. Clinically, if there is no recurrence after more than five years, it is considered to have achieved a clinically curative effect. For instance, surpassing five years can possibly mean extending survival beyond ten years or even longer. However, treatment for late-stage patients needs to be adjusted as it proceeds, and it is impossible to specifically determine how long one can live.

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Differentiation between Colon Polyps and Colon Cancer

The most distinct diagnostic criteria between colon polyps and colon cancer are that colon polyps are benign lesions, whereas colon cancer is a malignant tumor of the intestines. Colon polyps are generally small in size or present as multiple polyps, with localized mucosal elevation. They may appear the size of mung beans or be pedunculated, and may be accompanied by mild abdominal pain, generally without blood in the stool. In contrast, during the onset of colon cancer, there is usually abdominal pain accompanied by bloody stools. In the later or advanced stages of colon cancer, after the tumor ruptures, it may also lead to severe gastrointestinal bleeding, as well as overall bodily wasting and anemia. The prognosis for colon polyps is relatively good; regular follow-up checks are sufficient. However, for colon cancer, if detected early, surgical removal can be an option. The survival rate in the middle and late stages is lower than in the early stage, and treatment may require a combination of radiotherapy and chemotherapy.