Per-oral endoscopic myotomy: Major advance in achalasia treatment and in endoscopic surgery

Table 2 Characteristics of United States single center submucosal tunneling endoscopic resection series n (%)

Characteristics	Value
STER cases (n)	7
Time period	9/2013-4/2014
Mean age (yr)	52 (47-62)
Gender	3 males: 4 females
ASA classification
II	6 (86)
III	1 (14)
Location of lesion	4 GE junction; 2 esophagus; 1 gastric cardia
General anesthesia	100%
Procedure time (min)	53 (23-80)
Closure technique	2 clips (29); 5 endoscopic suture (71)
Histopathology	6 leiomyoma (86); 1 GIST (2/50 hpf) (14)
Mean size (cm)	1.5 (1-2.7)
En bloc resection	100%
Length of hospital stay (d)	2.3 (1-4)
Follow-up	100% no recurrence
Complications	1 mucosotomy required clipping
	1 stricture at submucosal tunnel site responded to balloon dilation at 4 wk

GE: Gastroesophageal; STER: Submucosal tunneling endoscopic resection; ASA: American Society of Anesthesiologists.