Abstract:Objective To evaluate the efficacy and safety of reverse endoscopic full-thickness resection (R-EFR) for treating gastric stromal tumors (GSTs) with predominantly extraluminal growth. Methods Data on 50 cases of GSTs with predominantly extraluminal growth who underwent R-EFR at Taizhou Municipal Hospital or East Hospital Affiliated to Tongji University between March 2019 and December 2024 were retrospectively collected. Based on inclusion and exclusion criteria, 31 cases were included in the data analysis. Surgical completion rate, postoperative hospital stay, incidence of complications, and follow-up outcome were recorded. Results All 31 tumors were completely resected en bloc. Surgical times ranged from 15 to 180 minutes, with a median of 55 minutes. Through-the-scope twin clips were used to close gastric wall defects in 9 cases (29.0%), while nylon ligatures and metal clips were employed in the remaining 22 cases (71.0%). Postoperative hospital stays ranged from 5 to 7 days, with a median of 6 days. Only one case (2.9%) experienced a complication (postoperative infection). The follow-up period ranged from 6 to 60 months, no recurrence or metastasis was observed during the follow-up. Conclusion These preliminary results indicate that R-EFR is a safe and effective treatment for GSTs with predominantly extraluminal growth.