Table 3.
Prevalence and distribution of advanced colorectal neoplasia in 4623 patients n (%)
| Localization in the colo-rectum | CRC | Advanced adenoma | Advanced neoplasia1 |
| Rectum | 86 (31) | 74 (22) | 160 (26) |
| Sigmoid | 77 (27) | 131 (38) | 208 (33) |
| Descending colon | 19 (7) | 29 (8) | 48 (8) |
| Transverse colon | 23 (8) | 19 (6) | 42 (7) |
| Ascending colon | 37 (13) | 46 (13) | 83 (13) |
| Caecum | 39 (14) | 43 (13) | 82 (13) |
| Total | 281 (100) | 342 (100) | 623 (100) |
1
Advanced neoplasia was defined as an adenoma > 1.0 cm and/or > 25% of villous architecture and/or high-grade dysplasia or cancer; In two patients, two CRC’s were found. In one case, both were located in the distal colon. In the other case, a distal and a proximal tumor was found; In 45 patients, both proximally and distally located advanced neoplasia were found.