Biomarker Analysis of Gastrointestinal Cancer

BIOMARKER ANALYSES 1. FNA Sample: From each enrolled patient who meets the inclusion criteria, FNA sample will only be taken . FNA will be carried out only in patients with feasible biopsy or FNA site. Ascites or pleural fluid will be collected for analysis 2. Blood Samples From each enrolled patient who meets the inclusion criteria, blood samples will be collected. 3 mL blood sample will be collected . 3. tumor tissue Archived Tumor Tissue (Slides) Samples Primary tumor and/or a metastatic lesion collected. Approximately 5 unstained slides (if available) are collected.