UNASSIGNED: The treatment of choice for @entity2909 , the most common @entity5 , is thoracoscopic enucleation. One of the most difficult aspects of thoracoscopic enucleation is the precise localization of small @entity5 (<= 1.5   cm) and @entity5 without external protrusion. No simple, feasible solutions to this problem are available. We developed a novel @entity6693 staining technique to localize small @entity2910 and evaluated the feasibility of our technique. Between January 2013 and July 2014, eight @entity1 with small @entity2910 (<= 1.5   cm) underwent thoracoscopic enucleation in Tongji Hospital. Preoperative endoscopic ultrasonography was performed in all @entity1 . The @entity2909 were located in the middle (n = 5) and lower (n = 3) thirds of the esophagus. We preoperatively injected 0.5-1.0   mL @entity6693 in the submucosa adjacent to the @entity5 under standard gastroscope guidance. The entire staining process took about 10   minutes. Staining was successful in all @entity1 . The unstained @entity5 was exposed after the blue-stained mediastinal pleura, and overlying muscle were incised longitudinally. All procedures were successfully completed without conversion to open surgery. No abnormalities were detected in the esophageal mucosa. The median operating time was 60   minutes (range, 40-90   minutes). Postoperative histopathology confirmed @entity2909 in all @entity1 . The median postoperative hospital stay was 6 days (range, 5-7 days). No major complications, such as esophageal leakage or esophageal diverticulum, occurred. Endoscopic @entity6693 staining is safe and feasible for localizing small @entity2910 during thoracoscopic enucleation. This method will enable precise and easy enucleation.

Novel XXXX staining technique for localizing small @entity2910 during thoracoscopic enucleation.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'benign esophageal tumor', 'tumors'] @entity2910 :: ('MESH:D004941', 'Disease') :: ['esophageal leiomyomas'] @entity6693 :: ('MESH:D008751', 'Chemical') :: ['methylene blue'] @entity2909 :: ('MESH:D007889', 'Disease') :: ['leiomyomas', 'leiomyoma']
@entity6693 :: (MESH:D008751,Chemical) :: ['methylene blue']
