Colonoscopy Recommendations: Screening Guidelines & When to Get One

A colonoscopy examines the large intestine (colon) and rectum. Recommendations:

Colorectal Cancer Screening

• Average risk: Start at age 45 (per American Cancer Society). Repeat every 10 years if normal.
• Detects and removes precancerous polyps before they become cancerous.

Diagnostic Indications

Evaluate symptoms such as:

• Persistent abdominal pain
• Rectal bleeding
• Chronic constipation or diarrhea
• Changes in bowel habits
• Unexplained weight loss
• Iron deficiency anemia (possible sign of colon cancer)

High-Risk Groups (Earlier/More Frequent Screening)

• Family history of colorectal cancer or adenomatous polyps
• Personal history of colon polyps, inflammatory bowel disease (Crohn's, ulcerative colitis), or genetic syndromes (e.g., Lynch syndrome)

Screening intervals vary by individual risk. Consult your healthcare provider for personalized schedule.