|
| Type 0-I (protruding) | Polypoid tumors |
| Type 0-IIa (superficial elevated) | Slightly elevated tumors |
| Type 0-IIb (superficial flat) | Tumors without elevation or depression |
| Type 0-IIc (superficial depressed) | Slightly depressed tumors |
| Type 0-III (excavated) | Tumors with deep depression |
|