Feasibility and Safety of Mark-Guided Submucosal Tunneling Endoscopic Resection for Treatment of Esophageal Submucosal Tumors Originating from the Muscularis Propria: A Single-Center Retrospective Study

Table 1

Baseline characteristics.

Characteristics
Gender (n, %)
Male	131 (54.1%)
Female	111 (45.9%)
Age (years)	54 (30–75)
Symptoms (n, %)
Typical	96 (39.7%)
Atypical	146 (60.3%)
Location (n, %)
Upper	42 (17.4%)
Middle	105 (43.3%)
Lower	95 (39.3%)
Size (mm)	22 (7–40)
Shape (n, %)
Regular	220 (90.9%)
Irregular	22 (9.1%)
Histology (n, %)
Leiomyomas	235 (97.1%)
GISTs	5 (2.1%)
Schwannoma	2 (0.8%)

Note: GISTs, gastrointestinal stromal tumors.