Colorectal Cancer

Canadian guidelines for Colorectal Cancer
Average Risk
    No family hx, or >60 at diagnosis
    Start Screening: 50 years or 45 if of African descent.
    - Prevention:
        a.) Colonoscopy q10y
        b.) Flexible Sigmoidoscopy q5-10y
        c.) CT colonography q5y
    - Early Detection:
        a.) FOBT yearly

Moderate Risk
    Family Hx --> 1st degree relative diagnosed <60 OR two 1st degree relatives
    Start: 40y or 10 years before diagnosis
    - Colonoscopy q5y

High Risk
    FAP
            -  Flex sig/colonoscopy yearly starting teens until advised to have surgery
    HNPCC
            - Colonoscopy at age 20-25 q2y until age 40, then yearly after 40.
    IBD (Ulcerative Colitis or Crohn's Disease)
            - Colonoscopy q1-2y after max 8y of colitis
            - Multiple biopsies to r/o dysplasia even if no lesions found
            - No screening if only proctitis