Colon Cancer
Blog post description.
8/7/20262 min read
Colon cancer is a type of cancer that starts in the colon, which is the longest part of the large intestine. It usually develops slowly over several years, often beginning as small growths called polyps. While many polyps are harmless, some can become cancerous over time.
Common symptoms
Early colon cancer may not cause any symptoms. As it progresses, symptoms can include:
Blood in the stool or rectal bleeding
A persistent change in bowel habits (diarrhea, constipation, or narrower stools)
Abdominal pain, cramping, or bloating
Feeling that the bowel doesn't empty completely
Unexplained weight loss
Fatigue or weakness, often due to anemia
These symptoms can also be caused by non-cancerous conditions, so they don't necessarily mean someone has colon cancer.
Risk factors
Factors that can increase the risk include:
Age (risk increases after age 45–50, though younger adults can also develop it)
A personal or family history of colon cancer or certain types of polyps
Inherited conditions such as Lynch syndrome or familial adenomatous polyposis
inflammatory bowel disease
Obesity
Physical inactivity
Diets high in processed or red meat and low in fiber
Smoking
Heavy alcohol use
type 2 diabetes
How it's diagnosed
If colon cancer is suspected, doctors may recommend:
A colonoscopy to examine the colon and take tissue samples (biopsies)
Blood tests, including tests for anemia
Imaging tests such as CT scans to determine whether the cancer has spread
Treatment
Treatment depends on the stage of the cancer and the person's overall health. It may include:
Surgery to remove the tumor
Chemotherapy
Radiation therapy (used more often for rectal cancer than colon cancer)
Targeted therapy
Immunotherapy for certain tumors with specific genetic features
Many people with early-stage colon cancer can be cured with surgery, while advanced cases can often be treated to control the disease and improve quality of life.
Screening
Screening can find precancerous polyps before they become cancer and can also detect cancer early, when treatment is most effective. For people at average risk, many medical organizations recommend starting routine screening at age 45, though the best test and schedule depend on individual risk factors.
When to seek medical care
You should arrange a medical evaluation if you have:
Blood in your stool
Persistent changes in bowel habits lasting more than a few weeks
Unexplained weight loss
Ongoing abdominal pain
Persistent fatigue, especially if accompanied by anemia
Common factors that increase the risk include:
Age: Risk increases with age, although colon cancer can occur in younger adults.
Inherited genetic conditions: Some people inherit mutations that greatly increase risk, such as Lynch syndrome or familial adenomatous polyposis.
Family history: Having a parent, sibling, or child with colon cancer or certain types of colon polyps increases your risk.
Colon polyps: Some polyps can gradually become cancerous if they are not removed.
Inflammatory bowel disease: Long-standing ulcerative colitis or Crohn's disease affecting the colon increases risk.
Diet: Diets high in processed meats and red meat and low in fruits, vegetables, and whole grains are associated with a higher risk.
Physical inactivity and obesity: Being inactive or having obesity is linked to an increased risk.
Smoking: Tobacco use increases the risk of developing and dying from colon cancer.
Heavy alcohol use: Regular heavy drinking is associated with a higher risk.
Type 2 diabetes: People with type 2 diabetes have a higher risk, even after accounting for other factors.
The above content is generated by AI.