According to ESPGHAN guidelines -see blog: What I Like About ESPGHAN Familial Adenomatous Polyposis Position Paper

• Recommendation 5: Despite the presence of gastric polyps in children, and the
  later risk of duodenal polyposis and ampullary cancer in adult practice, there is no justification to commence routine UGI surveillance until the age of 25 years.
  (weak recommendation, low-quality evidence, consensus agreement 90%)

A recent study questions this recommendation: T Middleton, I Sugarman. JPGN Reports Feb 2023: doi: 10.1097/PG9.0000000000000269. Open Access: Upper Gastrointestinal Screening of Polyp Load in Children With Familial Adenomatous Polyposis: Is It Required?

Methods: A prospective record of all upper GI endoscopies in children (aged 9 to 17) with FAP was kept across a 12-year period

Key finding:

• Thirty-eight esophagogastroduodenoscopies (79%) identified at least 1 gastric or duodenal polyp in 22 (79%) patients; 10 (36%) patients had gastric adenomas
• Eight (29%) patients showed very high numbers of polyps
• All 21 patients who had duodenal polyps had adenomas
• No patients had malignancy

My take: This is a provocative study. Is there a benefit for the patient in identifying gastric/duodenal polyps at a younger age?

Figure 1