Macroscopic features of the resected tumours
| Tumour size (mm) | ||||||
|---|---|---|---|---|---|---|
| Type | Mean | −10 | 11–20 | 21–30 | 31− | Total |
| 0-I type (protruded) | 19.7 | 5 | 5 | 3 | 2 | 15 |
| 0-IIa type (superficial elevated) | 15.7 | 72 | 84 | 21 | 7 | 184 |
| 0-IIc type (superficial depressed) | 11.2 | 186 | 77 | 14 | 3 | 280 |
| Total | 263 | 166 | 38 | 12 | 479 | |