Abstract 18
| Endoscopist/clinical error | 16 (73%) |
| Lesions not seen | 6 (27%) |
| Lesions seen, but not biopsied | 3 (14%) |
| Lesions seen, but biopsy was benign | 3 (14%) |
| Inadequate number of biopsies (sampling error) | 2 (9%) |
| Follow-up delays | 2 (9%) |
| Pathologist error | 6 (27%) |
| Total | 22 (100%) |