LAUSR

Refractory esophageal stricture is difficult to deal with. Some refractory stricture shows little response to now-existing endoscopic techniques. We assessed the efficacy of modified endoscopic radial incision and cutting method (M-RIC) for the treatment of refractory esophageal stricture. This was a retrospective study. Patients with refractory esophageal stricture who underwent M-RIC or dilation from June 2016 to June 2020 were included. Outcomes measured included technical and clinical success, restenosis rate, time to restenosis and complications. Risk factors for restenosis after M-RIC were assessed. 67 patients were enrolled (M-RIC group, n = 29; dilation group, n = 38). After propensity score matching, each group include 28 patients. There were no significant differences in technical success (96.4% vs 100%, p = 1.00) or clinical success (89.3% vs 100%, p = 0.23) between groups. Patients in M-RIC group had lower rates of restenosis (75% vs. 100%, p = 0.02) and longer time to restenosis (110 days vs 31.5 days, p = 0.00) compared with dilation group. 4 patients did not require any additional treatment after M-RIC and maintained food intake until the end of follow-up. Complications of M-RIC include perforation, fever and retrosternal pain, and no difference was found in total complication rate when compared with dilation group (25% vs 7.1%, p = 0.07). Although 3 out of 28 patients (10.7%) in M-RIC group had perforation, the perforation rate was not significantly different between groups (p = 0.11). Multivariate analyze suggested stricture length ≥ 5 cm (HR 7.25, p = 0.00) was a risk factor to restenosis while oral prednisone (HR 0.29, p = 0.02) was associated with preventing restenosis after M-RIC. M-RIC is a feasible and effective technique for refractory esophageal stricture with lower rate and longer time to restenosis. Stricture length ≥ 5 cm is a risk factor to restenosis while oral prednisone is helpful in remitting restenosis after M-RIC.