THERAPEUTIC OUTCOMES OF ENDOSCOPIC SUBMUCOSAL DISSECTION OF UNDIFFERENTIATED‐TYPE INTRAMUCOSAL GASTRIC CANCER WITHOUT ULCERATION AND PREOPERATIVELY DIAGNOSED AS 20 MILLIMETRES OR LESS IN DIAMETER

Abstract

ESD was technically feasible for expanded-indication lesions of undifferentiated-type EGC. We achieved a high rate of curative resection by the markings at sites 5 mm beyond the preoperatively determined lesion area. Factors responsible for non-curative resection were most commonly submucosal invasions. We should diagnose the depth of such lesions more carefully.