318. EFFICACY OF PROPHYLACTIC STEROID THERAPY OF INJECTION AND ADMINISTRATION AGAINST STRICTURE FOR SUBENTIRE CIRCUMFERENTIAL DEFECT AFTER ESOPHAGEAL ENDOSCOPIC SUBMUCOSAL DISSECTION

Abstract

Abstract Background Esophageal stricture is a major problem after endoscopic submucosal dissection (ESD) for large superficial esophageal squamous cell carcinomas (SESCC). Local triamcinolone injection (LTI) has been reported as the standard prophylactic treatment against stricture, however, it showed that its efficacy was insufficient for subentire circumferential mucosal defect after ESD in the subgroup analysis of randomized controlled trial (JCOG1217). On the other hand, the usefulness of oral prednisolone administration (OPA) has also been reported. Thus, we aimed to compare the efficacy of LTI with combination of LTI and OPA in patients with subentire circumferential mucosal defect after esophageal ESD. Methods This retrospective study enrolled the patients with mucosal defect after ESD larger than 7/8th circumference and not spreading entire who treated with LTI or combination of LTI and OPA between July 2010 to January 2020. Triamcinolone acetonide (50-100 mg) was injected into ulcer bed immediately after ESD, and oral prednisolone (30 mg daily, tapered gradually for 8 weeks) was administrated. We defined as an esophageal stricture in case the endoscope could not pass through the stricture, and then endoscopic balloon dilation (EBD) was required. We evaluated stricture-free survival (SFS), and the number and duration of EBD. Results A total of 42 patients in the LTI group and 26 in the combination group were enrolled. The median longitudinal extension of the lesions was 4.5 cm (range; 2-7) in the LTI group and 4 cm (2-7) in the combination group. Finally, 18 patients (42.9%) in the LTI group and 7 (26.9%) in the combination group developed esophageal stricture, and 12-week SFS was 64.3% and 76.9%. The median number and duration of required ESD were 6 (2-10) in the LTI group and 4 (2-9) in the combination group, and 88 days (15-288) and 66 days (22-176). Conclusion The steroid combination therapy of local triamcinolone injection and oral prednisolone administration showed the effective outcomes comparing with local triamcinolone injection alone for subentire circumferential mucosal defect after esophageal ESD. Thus, this combination therapy can be the most promising treatment and should be compared in the randomized controlled trail with large sample size.