Aetiology of postcolonoscopy colorectal cancers (PCCRCs) in relation to location and macroscopic appearance
| Aetiology of 147 PCCRCs | Proximal colon | Distal colon | ||||
|---|---|---|---|---|---|---|
| Total | Exophytic | Flat | Total | Exophytic | Flat | |
| Inadequate examination/surveillance, 29 (20%) | 21 (72%) | 8 (28%) | ||||
| 14 (67%) | 7 (33%) | 4 (50%) | 4 (50%) | |||
| Incomplete resection, 13 (9%) | 3 (23%) | 10 (77%) | ||||
| 1 (33%) | 2 (67%) | 8 (80%) | 2 (20%) | |||
| Missed lesions*, 85 (58%) | 52 (63%) | 31 (37%) | ||||
| 22 (43%) | 29 (57%) | 17 (55%) | 14 (45%) | |||
| Newly developed cancer, 20 (14%) | 11 (55%) | 9 (45%) | ||||
| 6 (55%) | 5 (45%) | 6 (67%) | 3 (33%) | |||
Data represent numbers (%) of patients.
*Location was unknown in two cases and morphology in one case.