Clinical efficacy and safety of palliative esophageal stenting without fluoroscopy: a systematic review and meta-analysis.

Despite advances in curative treatments for esophageal cancer, many patients often present with advanced disease. Dysphagia resulting in significant weight loss and malnutrition leads to poor quality of life. Palliative esophageal stenting with self-expanding metal stents (SEMS) helps alleviate symptoms and prolongs survival. However, access to fluoroscopy may be limited at certain centers causing delay in patient care. We searched multiple databases from inception to November 2019 to identify studies evaluating the efficacy and safety of endoscopic palliative esophageal stenting and selected only those studies where fluoroscopic guidance was not used. Our primary aim was to calculate the overall technical as well as clinical success. Using meta-regression analysis, we also evaluated the effect of tumor location and obstruction length on overall technical and clinical success. A total of 1778 patients from 17 studies were analyzed. A total of 2036 stents were placed without the aid of fluoroscopy. The pooled rate of technical success was 94.7 % (CI 89.9-97.3, PI 55-99; I  = 85) and clinical success was 82.1 % (CI 67.1-91.2, PI 24-99; I  = 87). Based on meta-regression analysis both the length of obstruction and tumor location did not have any statistically significant effect on technical and clinical success. The pooled rate of adverse events was 4.1 % (CI 2.4-7.2; I  = 72) for stent migration, 8.1 % (CI 4.1-15.4; I  = 89) for tumor overgrowth and 1.2 % (CI 0.7-2; I  = 0) for perforation. The most frequent clinical adverse event was retro-sternal chest pain. Palliative esophageal stenting without fluoroscopy using SEMS is both safe and effective in patients with advanced esophageal cancer.