ABSTRACT
Objective To evaluate the clinical value of preoperative mark with methylene blue for the submucosal tumor originating from the muscluaris propria around the cardia in submucosal tunnel.Meth-ods A total of 27 patients with cardiac tumors originating from muscularis propria diagnosed by endoscopy and endoscopic ultrasonography underwent endoscopic submucosal tunnel dissection from June 2011 to May 2014.Eighteen cases were marked by methylene blue,and 9 others were not.The operation time and the in-cidence of complications were compared between the two groups.Results All lesions were resected success-fully.The time of lesion location of non-mark group was 14.7 minutes(9-32 min),and that of mark group was 8.1 minutes(7-10 min).The incidence of subcutaneous emphysema of thorax and cervix of non-mark group was 2 /9(2 cases),and that of the mark group was 1 /18(1 case).The incidence of pneumoperitone-um of non-mark group was 1 /9(1 case),while that of the mark group was 2 /18(2 cases).There was no pneumothorax or mediastinal emphesema in all cases.Conclusion Marking with methylene blue before op-eration can shorten operation time effectively and lower incidence of complications.