Back to Results
Colon Cancer
Urgent
Colon cancer is a malignant growth that develops in the lining of the colon, part of the large intestine. It often begins as a polyp or other abnormal growth that can gradually develop into cancer over time. Early colon cancer may cause few or no noticeable symptoms. Possible symptoms include changes in bowel habits, blood in the stool, abdominal discomfort, unexplained weight loss, weakness, or anemia caused by chronic blood loss. Screening can identify some precancerous polyps and cancers before symptoms appear, while diagnosis and staging help determine the appropriate treatment approach.
Body System
Digestive System
When to Seek Medical Attention
Colon cancer requires medical evaluation and ongoing treatment. Seek prompt assessment for blood in the stool, persistent changes in bowel habits, unexplained weight loss, significant abdominal pain, weakness, or worsening symptoms. Emergency care is needed for severe abdominal pain, inability to pass stool or gas with vomiting, significant bleeding, fainting, or sudden deterioration.
Symptoms
3
Causes
2
Treatments
5
Diet
4
Overview
Colon cancer is a malignant growth that develops in the lining of the colon, part of the large intestine. It often begins as a polyp or other abnormal growth that can gradually develop into cancer over time. Early colon cancer may cause few or no noticeable symptoms. Possible symptoms include changes in bowel habits, blood in the stool, abdominal discomfort, unexplained weight loss, weakness, or anemia caused by chronic blood loss. Screening can identify some precancerous polyps and cancers before symptoms appear, while diagnosis and staging help determine the appropriate treatment approach.
Symptoms 3
Constipation
Jaundice
Persistent Hoarseness
Causes 2
Colon cancer develops when cells in the lining of the colon acquire changes that allow them to grow and divide abnormally. Many cases begin with adenomatous or other precancerous polyps that gradually acquire additional cellular changes. Genetic and inherited factors can contribute, while environmental and lifestyle factors may also influence risk. Chronic inflammation of the bowel and certain inherited conditions can increase susceptibility. The exact combination of factors differs between individuals.
Obesity
Smoking
Risk Factors
Risk factors for colon cancer include increasing age, a personal or family history of colorectal cancer or certain polyps, inherited cancer syndromes, inflammatory bowel disease, smoking, heavy alcohol use, physical inactivity, and certain dietary patterns. Excess body weight and metabolic health factors may also be associated with increased risk. Risk is influenced by multiple factors, and colon cancer can occur in people who do not have an obvious risk factor.
Diagnosis
Diagnosis is based on a patient's medical history,
symptoms, physical examination and, when necessary,
laboratory or imaging investigations.
Colon cancer may be detected through screening tests such as stool-based testing or colonoscopy, depending on age, risk, and applicable screening recommendations. When cancer is suspected, colonoscopy allows direct examination of the colon and removal or biopsy of abnormal tissue. A biopsy is used to establish the diagnosis of cancer. Additional imaging and laboratory evaluation may be performed to determine the stage of disease and whether it has spread to lymph nodes or other organs.
Prevention
Key Prevention Tips
The risk of colon cancer may be reduced through recommended colorectal cancer screening, avoiding tobacco, limiting excessive alcohol use, maintaining a healthy body weight, staying physically active, and following a balanced dietary pattern
Screening is particularly important because precancerous polyps can sometimes be detected and removed before they become cancer
People with a family history, inherited cancer syndrome, inflammatory bowel disease, or other increased-risk conditions may require a different screening approach based on medical advice
Prevention Guidance
The risk of colon cancer may be reduced through recommended colorectal cancer screening, avoiding tobacco, limiting excessive alcohol use, maintaining a healthy body weight, staying physically active, and following a balanced dietary pattern. Screening is particularly important because precancerous polyps can sometimes be detected and removed before they become cancer. People with a family history, inherited cancer syndrome, inflammatory bowel disease, or other increased-risk conditions may require a different screening approach based on medical advice.
Reminder: Prevention recommendations should be tailored to your personal health status and risk factors.
Treatment & Management 5
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Detailed treatment guidance is currently being prepared.
Medical Note: The treatment information provided is intended for educational purposes only.
Always consult a qualified healthcare professional before starting,
stopping, or changing any treatment.
Diet & Nutrition 4
Recommended Foods
Fresh Fruits
Provide antioxidants.
Vegetables
Support overall health.
Whole Grains
Provide fiber and nutrients.
Lean Protein
Supports recovery.
Foods to Avoid
Processed Meat
Associated with increased cancer risk.
Alcohol
May worsen health outcomes.
Medical Nutrition Note: Diet recommendations are intended for general educational purposes and should be tailored to individual health needs by a qualified healthcare professional.
Frequently Asked Questions 5
Colon cancer develops in the large intestine.
Blood in stool, weight loss, and bowel changes may occur.
Colonoscopy and biopsy are commonly used.
Screening and healthy lifestyle reduce risk.
Surgery, chemotherapy, and targeted therapy may be used.
Helpful Tip: These answers provide general medical information.
Consult your healthcare provider for advice tailored to your condition.