Objective: To evaluate the efficacy and feasibility of esophageal self-expanding metal stents (SEMS) insertion for malignant esophageal obstruction (MEO) in patients with or without additional palliative treatment.
Methods: We retrospectively reviewed the medical records of the patients with SEMS for MEO. Baseline characteristics, changes in Mellow-Pinkas dysphagia score, and adverse events were collected and compared according to the presence and absence of additional palliative treatment.
Results: Altogether 192 patients underwent 236 SEMS insertion procedures. Esophageal, gastric cardiac and lung cancers were seen in 46.4%, 33.3% and 15.1% of the patients, respectively. Their Mellow-Pinkas score significantly decreased within one week and one month after the SEMS insertion (1.66 ± 0.79 and 1.71 ± 0.87 vs 3.09 ± 0.79, respectively, P = 0.000). Complications occurred in 54 (22.9%) of 236 SEMS insertion; there were 28 (11.9%) stent obstruction, 5 (2.1%) perforation (2.1%), 10 (4.2%) stent migration, 5 (2.1%) tracheoesophageal fistula, but no procedure-related death. Most complications were managed by inserting additional SEMS. The risk of stent obstruction was significantly higher in uncovered stents than in covered SEMS (OR 3.56, 95% CI 1.39-9.12, P = 0.006). Mean duration to the development of complications was 74.8 ± 111.1 days. Overall survival (169.0 ± 127.8 days vs 96.4 ± 90.6 days, P = 0.000) and stent patency (143.3 ± 123.9 days vs 67.6 ± 71.3 days, P = 0.000) were significantly favorable in patients with SEMS and additional palliative treatments compared with those with SEMS alone.
Conclusion: SEMS insertion is effective and safe for treating MEO, and additional palliative treatment might lengthen stent patency by prolonging the patient's survival.
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