Preoperative endoscopic diagnosis of superficial non-ampullary duodenal epithelial tumors, including magnifying endoscopy

Table 2 Relationship between endoscopic findings and final histological grade

	Category3(n = 121)		Category4(n = 275)		P value
Diameter (mean, mm)	11.5 ± 0.7		17.5 ± 0.7		< 0.0001
Location (portion)
First	23	19%	46	17%	NS
Second	92	76%	205	74%
Third or fourth	6	5%	24	9%
Color
Red	36	30%	124	45%	< 0.01
Isochromatic or white	85	70%	151	55%
Macroscopic type
0-I	29	24%	58	21%	NS
0-IIa	71	59%	170	62%
0-IIc	21	17%	47	17%

Color or macroscopic type is adopted from the predominant color when tumor showed multiple colors or macroscopic types. Data from Goda et al[5]. NS: Not significant.