Clinical Research Directory

Inclusion Criteria: 1. Sample providers criteria * Male and female adult patients aged 19 years or over * Patients with histologically confirmed gastric adenocarcinoma * Patients with histologically confirmed stage Ⅱ or Ⅲ * Patients who have undergone radical gastrectomy * Patients who have not received neoadjuvant chemotherapy and radiotherapy * Patients who have undergone a radical gastrectomy and who show no evidence of residual tumors as observed with the unaided eye or through a microscope * Patients who have signed a written consent of the study and signed a human derived research agreement (Form 34) 2. Sample criteria * The formalin-fixed paraffin-embedded (FFPE) tumor specimens in storage have a tumor amount of at least 20% and therefore can be tested. * The quantity (not less than 400ng) and quality (A260/280 of not less than 1.8) of RNA are sufficient for analysis. Exclusion Criteria: 1. Sample providers criteria * Male and female patients aged less than 19 years * Patients with histologically not confirmed gastric adenocarcinoma * Patients with histologically confirmed stage Ⅰ or Ⅳ * Patients who have not undergone radical gastrectomy * Patients who have received neoadjuvant chemotherapy or radiotherapy * Patients with distant or peritoneal metastasis at the time of surgery or residual tumors after surgery * Patients who have not signed the study's written consent and human derived research agreement (Form 34) 2. Sample criteria * The FFPE tumor specimens in storage have a tumor amount of less than 20% and therefore cannot be tested * The quantity and quality of RNA are not sufficient for analysis