A colonoscopy lets doctors view the entire colon and remove pre-cancerous polyps in the same session.
- From age 45–50 — recommended every 10 years for average-risk adults.
- Earlier and more often — for those with family history or symptoms.
- Sedation — most patients sleep through the 30-minute procedure.
- Preparation — a day of clear-liquid diet and bowel cleansing is required.