Modality | Recommended age to start | Frequency |
Colonoscopy | 12–14 years | 1–2 years |
Gastroscopy with cap or duodenoscopy | 25 years (including AFAP) 35 years in MAP | According to modified Spigelman score and ampullary adenoma presence (table 2) |
Post-surgery IAP, IRA or ileostomy endoscopic assessment | <1 year after surgery | 1 year (consider 6 monthly if large polyp burden) |
AFAP, attenuated, variant of familial adenomatous polyposis; IAP, ileoanal pouch; IRA, ileorectal anastomosis; MAP, MUTYH-associated polyposis .