Abstract:

Objective To analyze the correctness of endoscopic ultrasonography (EUS) for the preoperative TN staging of gastric cancer and to explore the application value of EUS for the preoperative staging of gastric cancer. Methods Clinical data of 133 patients with gastric cancer who underwent preoperative EUS examinations and clinical staging were collected. The results of preoperative TN staging were compared to the results of postoperative histopathological staging. Results The overall accuracy rate of preoperatively clinical staging of T subsets for gastric cancer by EUS was 81.20%. The accuracy rates of T1 and T4 stages were higher and were 91.67% and 85.0%, respectively. The accuracy rates of T2 and T3 stages were lower and were 74.29% and 70.0%, respectively. Overestimation and underestimation were found during T-staging. Among all patients, 8 patients were overestimated and 17 patients were underestimated. The results of preoperative staging by EUS were highly consistent with the results of postoperative histopathological staging. The overall accuracy rate of N subsets by EUS was 78.95%. The accuracy rate for identifying positive lymph nodes was relatively low (66.10%). Conclusion Endoscopic ultrasonography can correctly identify the TN staging of gastric cancer and provide evidences for properly treatment options.

Key words: gastric tumor, endoscopic ultrasonography, gastric cancer, preoperative staging