In endoscopic treatment for gastric submucosal tumors arising from the muscularis propria, does robot-assisted surgery yield a higher serosa preservation rate, shorter operative time and lower complication rates than conventional endoscopic procedures?
Aged 18 to 80 years old;
Submucosal tumors originating from the muscularis propria of gastric fundus, highly suspected as gastrointestinal stromal tumor (GIST) confirmed by endoscopic ultrasonography (EUS) and contrast-enhanced computed tomography (CT);
Tumor diameter ranging from 1.0 cm to 3.0 cm;
No active ulcer or bleeding on the lesion surface before operation;
Tumor adhesion to serosa with unclear interface shown on EUS;
High-risk GIST or distant metastasis indicated by imaging or endoscopy;
History of gastric surgery or radiotherapy;
High bleeding risk including coagulation disorders and patients unable to discontinue anticoagulant medications;