Clinical Application of Ultrasonic Miniature Probe for Preoperative Staging of Gastric Cancer

Objective To evaluate the accuracy of T and N staging for gastric cancer and the usage of preoperative with endoscopic ultrasound mini probe.Methods The endoscopic ultrasound mini probe(12MHz) was used in this study and forty patients with cancer of gastric underwent endoscopic ultrasonography with this probe.The diagnosing of tumor invasion(T staging) and local lymphatic node metastasis(N staging) was compared with result of operations research and histological stage(pT and pN) of these patients.Accuracy of T staging and N staging were evaluated.Results The accuracy rate of T staging was 85% with this probe.The accuracy rate of N staging was 75%.Conclusion Ultrasound mini probe shows the prominent advantage in preoperative evaluation of the staging of gastric cancer especially in the diagnosis of the depth of tumor invasion and local lymph node metastasis.