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| Margin | Completely excised | Incompletely excised | Total number of cases | Percentage of completely excised | Percentage of incompletely excised |
| 1mm | 19 | 6 | 25 | 76% | 24% |
| 2mm | 498 | 67 | 565 | 88.15% | 11.85% |
| 3mm | 2499 | 267 | 2766 | 90.34% | 09.65% |
| 4mm | 309 | 26 | 335 | 92.22% | 07.76% |
| 5mm | 144 | 8 | 152 | 94.73% | 05.26% |
| Total | 3469 | 374 | 3843 |
