diagnosis
What's the difference between a stool test and a colonoscopy for screening?
A stool test and a colonoscopy both screen for colon cancer. But they check for it in different ways.
A stool test and a colonoscopy are both screening tests for colorectal cancer. They check for cancer in different ways.
A stool test checks a sample of stool for signs of trouble.
A colonoscopy is a procedure where a doctor looks inside the rectum and colon. The doctor uses a scope — a thin tube with a light and camera. During the colonoscopy, the doctor can also find polyps. Polyps are growths in the colon that can sometimes turn into cancer. A doctor can remove polyps during the same colonoscopy visit.
Screening tests look for signs of a disease before any symptoms appear. They can help find cancer early, when it may be easier to treat.
A care team can explain which test fits someone's situation. They can also explain how often it is needed.
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This page is educational, not medical advice. Talk with your care team about decisions that apply to you. If something feels urgent, contact your care team — for emergencies call your local emergency number.
More about Colorectal cancer
- Do I need colorectal cancer screening, and what does it involve?
- What does colorectal cancer staging mean, and why does it matter?
- What should I expect during a colonoscopy?
- What tests can diagnose colorectal cancer?
- How often do I need colorectal cancer screening?
- What can increase my risk of developing colorectal cancer?