Endoscopic full-thickness resection of a complete extraluminal growth gastric gastrointestinal stromal tumor with single-channel gastroscope.

A 54-year-old man was found a suspected gastric mass in a routine physical examination of chest computed tomography without abdominal symptoms for 1-month duration. Abdominal contrast-enhanced computed tomography demonstrated a clear boundary and complete extraluminal growth mass in the greater gastric curvature, which measured 20-mm with central punctate calcification and homogeneous enhancement.