Laparoscopic Endoscopic Cooperative Surgery for Rare Cystic Gastrointestinal Stromal Tumor of the Stomach: A Case Report.

Gastrointestinal stromal tumors of the stomach usually form a solid cellular mass; however, large, predominantly cystic tumors have rarely been reported. Although laparoscopic-endoscopic combined surgery for gastric gastrointestinal stromal tumors has rapidly gained popularity in recent years, most cystic gastrointestinal stromal tumors reported to date have been treated with open surgery because of concerns that they have a significantly increased risk of recurrence owing to tumor rupture during resection. The safety of laparoscopic-endoscopic combined surgery for cystic gastrointestinal stromal tumors is unknown. In this report, we describe a case in which laparoscopic-endoscopic combined surgery using the combined laparoscopic and endoscopic approach for neoplasia with a non-exposure technique was safely performed for a cystic gastrointestinal stromal tumor < 5 cm with external growth in the greater curvature of the lower body using a device to avoid capsular damage.