Feasibility of gastric endoscopic submucosal dissection in elderly patients aged ≥ 80 years

Table 5 Relations of complications to location or dissected size of endoscopic submucosal dissection specimens, n (%)

	Bleeding (+)	Bleeding (-)	Perforation (+)	Perforation (-)	Total
	n = 6	n = 169	n = 2	n = 173	n = 175
Location
Upper third	0	33 (100)	2 (6.1)	31 (93.9)	33
Middle third	1 (1.6)	56 (98.4)	0	57 (100)	57
Lower third	5 (5.9)	80 (94.1)	0	85 (100)	85
Size of specimen
≤ 20 mm	1 (3.3)	29 (96.7)	0	30 (100)	30
21-40 mm	1 (1.0)	102 (99.0)	1 (1.0)	102 (99.0)	103
41-60 mm	3 (8.1)	34 (91.9)	1 (2.7)1	36 (97.3)	37
≥ 61 mm	1 (20.0)	4 (80.0)	0	5 (100)	5

¹Not endoscopically dissected case.

Size of all-around incision of endoscopic submucosal dissection measured in a surgically resected specimen.