Table 13.

Surveillance of the remaining rectum and major associated lesions in patients with FAP after surgery

Associated lesions	Initiation age and screening procedures
Remaining rectal adenoma	Annual colonoscopy with polypectomy or ablation after IPAA
	Colonoscopy with polypectomy or ablation every 6 months (depending on age or density of adenoma) in patients who underwent IRA
Duodenal adenoma or cancer (including ampullary lesions)	Baseline upper gastrointestinal endoscopy is initiated at the time of colectomy or at 20–25 years of age, whichever is earlier. Thereafter, upper gastrointestinal endoscopy is repeated regularly depending on the severity
Gastric adenoma or cancer	Upper gastrointestinal endoscopy annually (or simultaneously with examination for duodenal lesions)
Thyroid cancer (for women)	Thyroid ultrasonography and palpation annually starting in the late teenage years
Intra-abdominal desmoid tumor	Abdominal palpation annually. After colectomy, abdominal and pelvic CT or MRI every 3 years in patients with a family history of desmoid tumors
Brain tumor	Annual examination
Jejunal ileal adenoma or cancer	Data to support any recommendation are lacking. Simultaneously performed with radiological examinations (CT/MRI) for desmoid tumors as much as possible

Modification with ref. [13]