Table 1: Macroscopic classification of early gastric cancers [3].

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