Additional laparoscopic gastrectomy after noncurative endoscopic submucosal dissection for early gastric cancer: A single-center experience

Table 2 Characteristics of cases with and without residual cancer, n (%)

Characteristic	Residual cancer		P-value
	Yes (n = 10)	No (n = 35)
Location			1.000
Upper third	4 (23.5)	13 (76.5)
Middle third	2 (18.2)	9 (81.8)
Lower third	4 (23.5)	13 (76.5)
Macroscopic appearance			0.694
Elevated type	1 (25.0)	3 (75.0)
Surface type	9 (23.1)	30 (76.9)
Depressed type	0 (0)	2 (100)
Tumor size			0.720
< 3 cm	5 (19.2)	21 (80.8)
≥ 3 cm	5 (26.3)	14 (73.7)
Differentiation			1.000
Differentiated	7 (22.6)	24 (77.4)
Undifferentiated	3 (21.4)	11 (78.6)
Lauren type			0.722
Intestinal	4 (18.2)	18 (81.8)
Diffused/Mixed	6 (26.1)	17 (73.9)
Depth of invasion			0.469
Mucosal invasion/SM1	2 (14.3)	12 (85.7)
> SM1 invasion	8 (25.8)	23 (74.2)
Horizontal margin			0.034
Positive	4 (57.1)	3 (42.9)
Negative	6 (15.8)	32 (84.2)
Vertical margin			0.292
Positive	8 (27.6)	21 (72.4)
Negative	2 (12.5)	14 (87.5)
Lymphovascular invasion			1.000
Yes	4 (21.1)	15 (78.9)
No	6 (23.1)	20 (76.9)
Neural invasion			0.007
Yes	6 (54.5)	5 (45.5)
No	4 (11.8)	30 (88.2)