Reason for inability to endoscopically manage recurrent/residual adenoma at SC1 follow-up (n=7)
| Deep extension into appendiceal orifice (not recognised at initial resection of large lesion) | 1 |
| Deep extension into ileocaecal valve and ileum (not recognised at initial resection of large lesion) | 2 |
| Extensive submucosal fibrosis | 2 |
| Assessed as high risk for SMIC so referred to surgery | 2 |
SC1, first surveillance colonoscopy performed 4 months after WF-EMR; SMIC, submucosal invasive cancer; WF-EMR, wide-field endoscopic mucosal resection.