Glycans Bound to Serum Haptoglobin: a Novel Gastric Cancer Tumor Biomarker

Arm1 (Gastric cancer patient) 1. Inclusion Criteria: * Male or female over 19 years * Patients with histologically Gastric Cancer (included Gastroesphageal junction) * Primary gastric cancer or/and metastatic gastric cancer. * Understand and voluntarily sign an informed consent document prior to any study related assessments/procedures are conducted 2. Exclusion Criteria: * Prior or present history of malignancies other than gastric cancer * Any condition that confounds the ability to interpret data from the study under the investigational confirmed. Arm2 (Cancer-free healthy volunteers) 1. Inclusion Criteria: * Male or female over 19 years * Cancer-free status. * Understand and voluntarily sign an informed consent document prior to any study related assessments/procedures are conducted 2. Exclusion Criteria: * Prior or present history of malignancies (included gastric cancer) * Any condition that confounds the ability to interpret data from the study under the investigational confirmed