Table 4 Malignant esophageal disease (clinical characteristics)

	Operation (+)					EMR or ESD	Operation (−)	Total
	Cases	30-day mortality			Hospital mortality
		Total	Hospital	After discharge
1. Esophageal cancer	6,055	47 (0.8)	45 (0.7)	2 (0.0)	131 (2.2)	1,804	2,175	10,034
Location								0
(1) Cervical esophagus	215	2 (0.9)	2 (0.9)	0	8 (3.7)	78	164	457
(2) Thoracic esophagus	5,022	43 (0.9)	42 (0.8)	1 (0.0)	114 (2.3)	1,506	1,845	8,373
(3) Abdominal esophagus	552	2 (0.4)	1 (0.2)	1 (0.2)	8 (1.4)	78	78	708
(4) Multiple cancers	261	0	0	0	1 (0.4)	118	70	449
(5) Others/not described	5	0	0	0	0	24	18	47
Tumor depth
(A) Superficial cancer	1,759	11 (0.6)	10 (0.6)	1 (0.1)	26 (1.5)	1,802	232	3,793
(B) Advanced cancer	4,288	36 (0.8)	35 (0.8)	1 (0.0)	104 (2.4)	0	1,943	6,231
(C) Not specified	8					2	0	10
2. Multiple primary cancers	967	8 (0.8)	7 (0.7)	1 (0.1)	20 (2.1)	364	313	1,644
1) Synchronous	558	3 (0.5)	2 (0.4)	1 (0.2)	9 (1.6)	138	172	868
(1) Head and neck	177	1 (0.6)	1 (0.6)	0	2 (1.1)	60	45	282
(2) Stomach	221	0 (0.0)	0	0	4 (1.8)	35	55	311
(3) Others	137	2 (1.5)	0	1 (0.7)	1 (0.7)	27	54	218
(4) Triple cancers	23	1	1 (4.3)	0	2 (8.7)	16	18	57
2) Metachronous	409	5 (1.2)	5 (1.2)	0	11 (2.7)	225	138	772
(1) Head and neck	82	2 (2.4)	2 (2.4)	0	2 (2.4)	93	30	205
(2) Stomach	132	2 (1.5)	2 (1.5)	0	6 (4.5)	51	45	228
(3) Others	171	1 (0.6)	1 (0.6)	0	2 (1.2)	48	43	262
(4) Triple cancers	24	0	0	0	1 (4.2)	32	17	73

Values in parenthesis represent mortality %

EMR endoscopic mucosal resection (including endoscopic submucosal dissection)