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Distribution of patients in accordance with the two modes of T1 substaging.
| T1 substaging | No. (%) |
|---|---|
| According to MM-VP invasion | |
| T1a | 15 (37.5) |
| T1b | 25 (62.5) |
| T1c | 0 (0) |
| According to tumour diameter invading the lamina propria | |
| T1m | 12 (30) |
| T1e | 28 (70) |
MM-VP, muscularis mucosae-vascular plexus.
