Submucosal tunneling endoscopic resection: An effective and safe therapy for upper gastrointestinal submucosal tumors originating from the muscularis propria layer

Table 1 Detailed characteristics of the 165 enrolled patients and submucosal tumors n (%)

Outcome	Result (n = 165)
Age, mean ± SD (yr)	46.9 (10.8)
Sex
Men	112 (67.9)
Women	53 (32.1)
Tumor size, median (range, mm)	20.0 (5.0-80.0)
Tumor location
Upper esophagus	11 (6.7)
Middle esophagus	49 (29.7)
Lower esophagus	46 (27.9)
Cardia	59 (35.7)
Tumor shape
Regular	85 (51.5)
Irregular	80 (48.5)
Pathological diagnosis
Leiomyomas	157 (95.2)
GISTs	3 (1.8)
Lipomas	3 (1.8)
Schwannomas	1 (0.6)
Fibrous tumor	1 (0.6)

GISTs: Gastrointestinal stromal tumors.