Endoscopic submucosal dissection for treatment of esophageal submucosal tumors originating from the muscularis propria layer

Background: The technique of endoscopic submucosal dissection (ESD), which was developed for en bloc resection of large lesions in the stomach, has been widely accepted for the treatment of early gastric cancer. It is being used for muscularis propria tumors of the digestive tract and has produced positive therapeutic effects. Objective: To study the feasibility of ESD for the removal of esophageal muscularis propria tumors and to evaluate the efficacy and safety of ESD for this treatment. Design: Single-center, retrospective study. Setting: University hospital. Patients: Thirty esophageal muscularis propria tumors from 28 patients were treated with ESD between December 2008 and December 2010. We defined esophageal muscularis propria tumors as esophageal submucosal tumors originating from the muscularis propria layer. Intervention: ESD. Main Outcome Measurements: Tumor characteristics, complications, en bloc resection rate, and local recurrence rate were evaluated. Results: Among the 28 patients, 11 were women (39.3%). The median age was 49.32 years (range 22-62 years). Mean (+/- SD) tumor size was 1.25 +/- 0.70 cm (range 0.5-3.0 cm). Except for 2 failed cases (one changed to surgery and the other changed to nylon ligation), 26 cases with 28 tumors (2 cases had 2 tumors) originating from the muscularis propria of the esophagus were successfully resected by ESD. The en bloc resection rate was 93.3% (28/30). The median ESD procedure time was 73.5 minutes (range 30-120 minutes). Perforation occurred in 2 cases during dissection of the lesion, which was closed with metal endoclips. Pneumothorax occurred after the treatment in both cases. Closed thoracic drainages were initiated, and the patients recovered quickly without surgery. Pathological examination confirmed 27 leiomyomas and 1 GI stromal tumor. The curative resection rate was 100% (28/28). There was no recurrence during a 3 to 27-month follow-up period. Limitations: The limitation of the study was its retrospective design. Conclusion: ESD offers the promise of localized treatment of esophageal muscularis propria tumors with relatively few complications and low mortality. It makes the resection of whole lesions possible and provides precise histologic information. (Gastrointest Endosc 2011;74:1194-200.)