149 patients (23.1%) with AA (65.7% in right colon). The median surveillance interval between colonoscopies was 60.0 months (36.0-60.0 IQR). On surveillance colonoscopy, the odds of having any adenoma in any part of the colon was 0.95 (95%CI 0.68-1.31; pZ0.74) in both groups; while the OR of having any AA was 1.26 (95%C 0.83-1.92; pZ0.29). However, patients with exclusively with right versus left colon adenoma had a significantly higher prevalence of metachronous exclusive right colon adenoma [54.45 vs 41.2%, p<0.001]. Conclusions: Having only right colon adenomas is more prevalent than only left colon adenomas. Patients with only right colon adenomas on index colonoscopy, when compared to those with only left colon adenomas: Don't have a higher risk of metachronous advanced adenomas. Have a higher risk of metachronous right sided only adenomas. This re-emphasizes the importance of a high-quality right colon examination.