Back to Menu
What is colon cancer?
Colon cancer is a gastrointestinal malignancy occurring in the colon and originating from the colonic mucosal epithelium. Its development is a complex, multifactorial, multistep process that spans multiple stages, including precancerous lesions, carcinoma in situ, and invasive carcinoma.
Main types and classification of colon cancer
1.Adenocarcinoma Accounts for more than 95% of cases and includes papillary, tubular, mucinous, and signet-ring cell carcinomas.
2.Adenosquamous carcinoma Contains both adenocarcinoma and squamous carcinoma components.
3.Squamous cell carcinoma Rare and most commonly occurs in the distal colon.
4.Small cell carcinoma Highly malignant and aggressive, with a poor prognosis.
5.Undifferentiated carcinoma Extremely poorly differentiated, rapidly growing, and prone to early metastasis.
6.Chromosomal instability type The most common pathway, characterized by aneuploidy and loss of heterozygosity.
7.Microsatellite instability type Associated with Lynch syndrome or sporadic MSI and generally has a better prognosis.
8.CpG island methylator phenotype (CIMP) More common in older women and in the right-sided colon.
9.Serrated pathway type Arises through serrated polyp pathways and has distinct molecular features.
Etiology of colon cancer
1.Dietary factors High-fat, low-fiber diets and excessive intake of red and processed meats.
2.Genetic factors Hereditary conditions such as familial adenomatous polyposis and Lynch syndrome.
3.Precancerous lesions Colonic adenomas and chronic inflammatory stimulation from ulcerative colitis and Crohn’s disease.
4.Lifestyle factors Smoking, alcohol consumption, physical inactivity, and obesity significantly increase risk.
5.Age Incidence rises markedly in individuals older than 50 years.
6.Metabolic diseases Diabetes and insulin resistance are associated with colon cancer risk.
Prevention and health maintenance for colon cancer
1.Regular screening Routine colonoscopy for individuals older than 50 years, with earlier screening for high-risk populations; fecal occult blood testing for initial screening.
2.Healthy diet Increase dietary fiber, reduce red and processed meats, and increase intake of fruits and vegetables.
3.Lifestyle optimization Quit smoking, limit alcohol intake, engage in moderate physical activity, control body weight, and avoid prolonged sitting.
Conclusion
Jinshazhou Hospital of Guangzhou University of Chinese Medicine emphasizes that the incidence of colon cancer continues to rise. Promoting healthy lifestyles and standardized colonoscopic screening enables early detection and timely treatment. Individualized strategies incorporating surgery, chemotherapy, and targeted therapies based on stage and molecular subtype, supported by MDT-based multidisciplinary collaboration, are central to improving treatment outcomes and quality of life.
What is colon cancer?
Colon cancer is a gastrointestinal malignancy occurring in the colon and originating from the colonic mucosal epithelium. Its development is a complex, multifactorial, multistep process that spans multiple stages, including precancerous lesions, carcinoma in situ, and invasive carcinoma.
Main types and classification of colon cancer
1.Adenocarcinoma Accounts for more than 95% of cases and includes papillary, tubular, mucinous, and signet-ring cell carcinomas.
2.Adenosquamous carcinoma Contains both adenocarcinoma and squamous carcinoma components.
3.Squamous cell carcinoma Rare and most commonly occurs in the distal colon.
4.Small cell carcinoma Highly malignant and aggressive, with a poor prognosis.
5.Undifferentiated carcinoma Extremely poorly differentiated, rapidly growing, and prone to early metastasis.
6.Chromosomal instability type The most common pathway, characterized by aneuploidy and loss of heterozygosity.
7.Microsatellite instability type Associated with Lynch syndrome or sporadic MSI and generally has a better prognosis.
8.CpG island methylator phenotype (CIMP) More common in older women and in the right-sided colon.
9.Serrated pathway type Arises through serrated polyp pathways and has distinct molecular features.
Etiology of colon cancer
1.Dietary factors High-fat, low-fiber diets and excessive intake of red and processed meats.
2.Genetic factors Hereditary conditions such as familial adenomatous polyposis and Lynch syndrome.
3.Precancerous lesions Colonic adenomas and chronic inflammatory stimulation from ulcerative colitis and Crohn’s disease.
4.Lifestyle factors Smoking, alcohol consumption, physical inactivity, and obesity significantly increase risk.
5.Age Incidence rises markedly in individuals older than 50 years.
6.Metabolic diseases Diabetes and insulin resistance are associated with colon cancer risk.
Prevention and health maintenance for colon cancer
1.Regular screening Routine colonoscopy for individuals older than 50 years, with earlier screening for high-risk populations; fecal occult blood testing for initial screening.
2.Healthy diet Increase dietary fiber, reduce red and processed meats, and increase intake of fruits and vegetables.
3.Lifestyle optimization Quit smoking, limit alcohol intake, engage in moderate physical activity, control body weight, and avoid prolonged sitting.
Conclusion
Jinshazhou Hospital of Guangzhou University of Chinese Medicine emphasizes that the incidence of colon cancer continues to rise. Promoting healthy lifestyles and standardized colonoscopic screening enables early detection and timely treatment. Individualized strategies incorporating surgery, chemotherapy, and targeted therapies based on stage and molecular subtype, supported by MDT-based multidisciplinary collaboration, are central to improving treatment outcomes and quality of life.