Synchronous lesions in the colon proximal to stenosing cancer found in surgical specimens and on postsurgical colonoscopy
| Lesion diameter | |||||
| ≤5 mm | 6–9 mm | ≥10 mm | Subtotal (≥6 mm) | Total | |
| Neoplastic | |||||
| Serrated adenoma | 2 | 1 | 1 | 3 | |
| Tubular adenoma | 110 | 73 | 45 | 118 | 228 |
| Tubulovillous adenoma | 2 | 1 | 3 | 3 | |
| Villous adenoma | 1 | 1 | 1 | ||
| High grade dysplasia | 2 | 5 | 7 | 7 | |
| Adenocarcinoma | 1 | 7 | 8 | 8 | |
| Hamartoma | 1 | 1 | 1 | ||
| Subtotal (neoplastic) | 112 | 78 | 61 | 139 | 251 |
| Non-neoplastic | |||||
| Inflammatory | 19 | 2 | 2 | 21 | |
| Hyperplastic | 39 | 9 | 2 | 11 | 50 |
| Xanthoma | 1 | 1 | |||
| Normal mucosa | 4 | 4 | |||
| Subtotal (non-neoplastic) | 63 | 11 | 2 | 13 | 76 |
| Total | 175 | 89 | 63 | 152 | 327 |