Endoscopic Ultrasonographic Staging and Conventional Endoscopic Staging for Depth of Invasion for Early Gastric Cancer

Prospective Study of Endoscopic Ultrasonographic Staging and Conventional Endoscopic Staging for Depth of Invasion and Endoscopic Tumor Size Estimation for Early Gastric Cancer

The accurate prediction of depth of tumor invasion in early gastric cancer is essential for the proper selection of candidates for endoscopic resection. Conventional endoscopy and endoscopic ultrasonography have been useful diagnostic method for depth of invasion in early gastric cancer. However, there has been no prospective comparative study on the accuracy between the 2 methods. Therefore, the investigators prospectively compare the accuracy between the 2 methods regarding prediction of depth of invasion.

Inclusion Criteria:

• Patients with early gastric adenocarcinoma undergo both endoscopic staging and endoscopic ultrasonographic staging for depth of invasion

Exclusion Criteria:

• patients had previously received neoadjuvant chemotherapy or chemoradiotherapy
• patients with obviously advanced gastric cancer by endoscopy
• the evidence of distant metastasis or extensive adjacent organ invasion on abdominal CT scan