BACKGROUND AND STUDY AIM: Although the majority of @entity5 ( @entity5 ) are benign, some do have a malignant potential. Resection of @entity5 would aid in establishing the diagnosis and may be curative. Our aim was to examine the feasibility and safety of a novel method for endoscopic resection of upper gastrointestinal @entity5 . @entity1 AND METHODS: In 12 @entity1 who presented with an upper gastrointestinal SMT of  <=40 mm located in the esophagus or @entity418 , a submucosal tunnel was endoscopically created starting approximately 5 cm proximal to the lesion. After careful submucosal dissection with @entity544 or air insufflation, the @entity5 were completely removed, and the entrance of the tunnel closed using endoclips. RESULTS: @entity5 had a mean size of 19.5 mm (range 10-40 mm); eight were located in the esophagus and four in the @entity418 . SMT resection was successful in all @entity1 with en bloc resection in 10 @entity1 (83.3%) and resection in two pieces in the remaining two @entity1 . The mean time required for the procedure was 48.3 minutes (range 30-60 minutes). Two @entity1 had both pneumothorax and @entity9285 . All the complications resolved with conservative management. CONCLUSIONS: In this pilot study, @entity5848 ( @entity5848 ) of esophageal and @entity418 @entity5 was effective and appeared to be safe. Larger studies that also examine its application for gastric @entity5 are warranted.

Preliminary experience of XXXX for upper gastrointestinal submucosal tumors.

@entity1 :: ('9606', 'Species') :: ['patients', 'PATIENTS'] @entity9285 :: ('MESH:D013352', 'Disease') :: ['subcutaneous emphysema'] @entity5 :: ('MESH:D009369', 'Disease') :: ['SMTs', 'submucosal tumors'] @entity5848 :: ('MESH:D000784', 'Disease') :: ['endoscopic submucosal tunnel dissection', 'ESTD'] @entity418 :: ('MESH:D004938', 'Disease') :: ['cardia'] @entity544 :: ('MESH:D002245', 'Chemical') :: ['carbon dioxide']
@entity5848 :: (MESH:D000784,Disease) :: ['endoscopic submucosal tunnel dissection']
