Fig. 1.

Sum diameter of duodenal polyps grouped by age at colectomy. The study consisted of 110 subjects with a colectomy and divided into 4 age groups and one group that had not had colectomy (25 juvenile at age 8–17 years indicated by (○); 38 young adult at age 18–30 years indicated by (Δ); 29 adult at age 31–40 years indicated by (+) and 18 mature adult at age 41 or older indicated by (x)) and 40 who had not undergone a colectomy at time of upper endoscopy (NA) indicated by (◊). Each individual is plotted based on duodenal polyp burden in millimeters versus the age when the duodenal data were captured by endoscopy