Difference between colon polyps and colon cancer

Written by Chen Tian Jing

Colorectal Surgery

Updated on September 30, 2024

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Colon polyps and colon cancer both belong to organic tumors of the colon mucosa, but the fundamental difference is that colon polyps are mostly benign, while colon cancer is a malignant cancer of the intestines. Both colon cancer and colon polyps require examination by electronic colonoscopy for a definitive diagnosis, and further pathological examination is needed. After the detection of colon polyps, it is necessary to promptly perform radiofrequency ablation surgery under electronic colonoscopy. After the detection of colon cancer, it is necessary to complete relevant pelvic and systemic examinations, and after clarifying the local lesions, surgical removal is performed. Postoperatively, based on the size of the cancerous mass and the extent of the lesion, radiation therapy or chemotherapy may be required.

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Early symptoms of colon cancer

Colon cancer often does not have obvious symptoms in its early stages, and of course, the specific situation needs to be analyzed on a case-by-case basis, as it varies from person to person. As the disease progresses, some clinical symptoms may appear. The first one is changes in bowel habits and stool characteristics; there might be blood in the stool, changes such as an increased frequency of defecation, urgency followed by a feeling of incomplete evacuation, and a sensation of rectal fullness, along with possible changes in the shape or thinning of the stool. The second possible symptom is abdominal pain, which may also be accompanied by a feeling of bloating or abdominal discomfort. The third possibility is the symptoms of intestinal obstruction, which include cessation of bowel movements and passing gas. The fourth is that a mass may be felt in the abdomen. The fifth point is that some individuals, especially those in poor health, may experience symptoms of nutritional depletion from the tumor, such as anemia, weight loss, and fatigue. If there is early metastasis, symptoms corresponding to the metastasis may also appear.

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Written by Yan Chun

Oncology

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Is having dry stools every day colon cancer?

Dry stools every day can be a clinical manifestation of colon cancer, often due to lesions in the colon caused by the invasion of cancer. Sometimes, it is caused by cancerous bowel obstruction. In addition to dry stools, some patients may also experience nausea, vomiting, abdominal distension, abdominal pain, and constipation. However, daily dry stools are not solely caused by colon cancer; some benign intestinal diseases can also lead to this condition, such as chronic constipation or melanosis coli, where patients may experience daily hard stools. Moreover, if dry stools occur daily and persist over a long period, they can potentially lead to malignant changes. Therefore, patients with daily dry stools should regularly undergo colonoscopy to prevent any pathological changes that might have progressed to cancer. Prompt treatment should be administered if the condition worsens.

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Written by Quan Xiang Mei

Pediatrics

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Can baby's stool with blood be colon cancer?

Blood in the stool of babies is different from that in adults. In infants and young children, due to weaker gastrointestinal digestive functions, inappropriate feeding, changes in diet structure, or abnormal gastrointestinal functions can all lead to the presence of blood in the stool, which is usually not due to colon cancer. Therefore, if a child has persistent blood in their stool accompanied by either no weight gain or weight loss, or other abnormal symptoms, and if there is a suspicion of cancer-related factors, parents should promptly take the child to a hospital for a thorough examination. In most cases, blood in a baby's stool is commonly due to poor digestion of the gastrointestinal tract or from gastroenteritis caused by viruses or bacteria due to an increase in the frequency of bowel movements, or it could be due to severe constipation in the baby, where factors like anal fissures might also lead to blood in the stool.

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Written by Shen Jiang Chao

Radiology

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Colorectal Cancer CT Manifestations and Differential Diagnosis

Early-stage colon cancer is difficult to clearly detect on a CT scan. In the moderate to late stages, colon cancer has more typical manifestations on CT, mainly characterized by thickening of the colon wall, irregular narrowing of the intestinal lumen, and stiffness of the intestinal wall. After enhancement, significant enhancement can be observed. The pericolonic fat space may appear blurred, and in the late stages, small lymph nodes can be seen, and even distant metastasis, most commonly to the liver, can be detected. It is necessary to differentiate colon cancer from colonic inflammation. Inflammatory lesions are usually more widespread and have typical clinical features such as fever and abdominal pain. It is also necessary to differentiate from lymphoma, as lymphomas also cause narrowing of the intestinal lumen but the narrowing is not eccentric and the intestinal wall remains soft, generally not leading to obstruction, whereas in late-stage colon cancer, colonic obstruction can be observed.

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Written by Chen Tian Jing

Colorectal Surgery

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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.