Endoscopic submucosal dissection with an SB Knife® for the treatment of subcardial gastric leiomyoma.

Surgery has been considered the main treatment for submucosal tumors (SMTs). However, endoscopic resection is currently accepted for gastric SMTs smaller than 3 cm. Endoscopic submucosal dissection (ESD) is considered the technique of choice, and submucosal tunneling endoscopic resection has successful results with low complication rates according to the recent meta-analysis by Cao et al. The major limitation of these methods is the technical difficulty associated with certain anatomic locations.