Evaluation of the margins of differentiated early gastric cancer by using conventional endoscopy

Table 1 The characteristics of 364 lesions

Age (yr)
Median ± SD	70 ± 9
Range	30-92
Sex
Men (%)	293 (80.5)
Women (%)	71 (19.5)
Tumor location (three parts)
U (%)	74 (20.3)
M (%)	144 (39.6)
L (%)	146 (40.1)
Tumor location (cross-sectional parts)
Less (%)	140 (38.5)
Gre (%)	59 (16.2)
Ant (%)	64 (17.6)
Post (%)	101 (27.7)
Color
Reddish (%)	213 (58.5)
Discolored (%)	87 (23.9)
Normal color (%)	64 (17.6)
Margin of the lesion
Delineated	337 (92.6)
Undelineated	27 (7.4)
Main macroscopic type
0-I (%)	11 (3.0)
0-IIa (%)	154 (42.3)
0-IIb (%)	6 (1.6)
0-IIc (%)	193 (53.0)
Components of flat area (0-IIb)
Presence (%)	17 (4.7)
Absense (%)	347 (95.3)
Tumor size (mm)
Median ± SD	16 ± 13
Range	2-100
Ulceration finding
Presence (%)	62 (17.0)
Absense (%)	302 (83.0)
Components of poorly differentiated adenocarcinoma in the mucosal surface
Presence (%)	26 (7.1)
Absense (%)	338 (92.9)
Metaplasia around the lesion
Presence (%)	337 (92.6)
Absense (%)	27 (7.4)
Marking
Right	302 (83.0)
Wrong	62 (17.0)

SD: Standard deviation; U: The upper third of the stomach; M: The middle third of the stomach; L: The lower third of the stomach; Less: The lesser curvature; Gre: The greater curvatures; Ant: The anterior wall; Post: The posterior wall.